/*  Prototype JavaScript framework, version 1.6.1

  *  (c) 2005-2009 Sam Stephenson

  *

  *  Prototype is freely distributable under the terms of an MIT-style license.

  *  For details, see the Prototype web site: http://www.prototypejs.org/

  *

  *--------------------------------------------------------------------------*/

 

 var Prototype = {

   Version: '1.6.1',

 

   Browser: (function(){

     var ua = navigator.userAgent;

     var isOpera = Object.prototype.toString.call(window.opera) == '[object Opera]';

     return {

       IE:             !!window.attachEvent && !isOpera,

       Opera:          isOpera,

       WebKit:         ua.indexOf('AppleWebKit/') > -1,

       Gecko:          ua.indexOf('Gecko') > -1 && ua.indexOf('KHTML') === -1,

       MobileSafari:   /Apple.*Mobile.*Safari/.test(ua)

     }

   })(),

 

   BrowserFeatures: {

     XPath: !!document.evaluate,

     SelectorsAPI: !!document.querySelector,

     ElementExtensions: (function() {

       var constructor = window.Element || window.HTMLElement;

       return !!(constructor && constructor.prototype);

     })(),

     SpecificElementExtensions: (function() {

       if (typeof window.HTMLDivElement !== 'undefined')

         return true;

 

       var div = document.createElement('div');

       var form = document.createElement('form');

       var isSupported = false;

 

       if (div['__proto__'] && (div['__proto__'] !== form['__proto__'])) {

         isSupported = true;

       }

 

       div = form = null;

 

       return isSupported;

     })()

   },

 

   ScriptFragment: '<script[^>]*>([\\S\\s]*?)<\/script>',

   JSONFilter: /^\/\*-secure-([\s\S]*)\*\/\s*$/,

 

   emptyFunction: function() { },

   K: function(x) { return x }

 };

 

 if (Prototype.Browser.MobileSafari)

   Prototype.BrowserFeatures.SpecificElementExtensions = false;

 

 

 var Abstract = { };

 

 

 var Try = {

   these: function() {

     var returnValue;

 

     for (var i = 0, length = arguments.length; i < length; i++) {

       var lambda = arguments[i];

       try {

         returnValue = lambda();

         break;

       } catch (e) { }

     }

 

     return returnValue;

   }

 };

 

 /* Based on Alex Arnell's inheritance implementation. */

 

 var Class = (function() {

   function subclass() {};

   function create() {

     var parent = null, properties = $A(arguments);

     if (Object.isFunction(properties[0]))

       parent = properties.shift();

 

     function klass() {

       this.initialize.apply(this, arguments);

     }

 

     Object.extend(klass, Class.Methods);

     klass.superclass = parent;

     klass.subclasses = [];

 

     if (parent) {

       subclass.prototype = parent.prototype;

       klass.prototype = new subclass;

       parent.subclasses.push(klass);

     }

 

     for (var i = 0; i < properties.length; i++)

       klass.addMethods(properties[i]);

 

     if (!klass.prototype.initialize)

       klass.prototype.initialize = Prototype.emptyFunction;

 

     klass.prototype.constructor = klass;

     return klass;

   }

 

   function addMethods(source) {

     var ancestor   = this.superclass && this.superclass.prototype;

     var properties = Object.keys(source);

 

     if (!Object.keys({ toString: true }).length) {

       if (source.toString != Object.prototype.toString)

         properties.push("toString");

       if (source.valueOf != Object.prototype.valueOf)

         properties.push("valueOf");

     }

 

     for (var i = 0, length = properties.length; i < length; i++) {

       var property = properties[i], value = source[property];

       if (ancestor && Object.isFunction(value) &&

           value.argumentNames().first() == "$super") {

         var method = value;

         value = (function(m) {

           return function() { return ancestor[m].apply(this, arguments); };

         })(property).wrap(method);

 

         value.valueOf = method.valueOf.bind(method);

         value.toString = method.toString.bind(method);

       }

       this.prototype[property] = value;

     }

 

     return this;

   }

 

   return {

     create: create,

     Methods: {

       addMethods: addMethods

     }

   };

 })();

 (function() {

 

   var _toString = Object.prototype.toString;

 

   function extend(destination, source) {

     for (var property in source)

       destination[property] = source[property];

     return destination;

   }

 

   function inspect(object) {

     try {

       if (isUndefined(object)) return 'undefined';

       if (object === null) return 'null';

       return object.inspect ? object.inspect() : String(object);

     } catch (e) {

       if (e instanceof RangeError) return '...';

       throw e;

     }

   }

 

   function toJSON(object) {

     var type = typeof object;

     switch (type) {

       case 'undefined':

       case 'function':

       case 'unknown': return;

       case 'boolean': return object.toString();

     }

 

     if (object === null) return 'null';

     if (object.toJSON) return object.toJSON();

     if (isElement(object)) return;

 

     var results = [];

     for (var property in object) {

       var value = toJSON(object[property]);

       if (!isUndefined(value))

         results.push(property.toJSON() + ': ' + value);

     }

 

     return '{' + results.join(', ') + '}';

   }

 

   function toQueryString(object) {

     return $H(object).toQueryString();

   }

 

   function toHTML(object) {

     return object && object.toHTML ? object.toHTML() : String.interpret(object);

   }

 

   function keys(object) {

     var results = [];

     for (var property in object)

       results.push(property);

     return results;

   }

 

   function values(object) {

     var results = [];

     for (var property in object)

       results.push(object[property]);

     return results;

   }

 

   function clone(object) {

     return extend({ }, object);

   }

 

   function isElement(object) {

     return !!(object && object.nodeType == 1);

   }

 

   function isArray(object) {

     return _toString.call(object) == "[object Array]";

   }

 

 

   function isHash(object) {

     return object instanceof Hash;

   }

 

   function isFunction(object) {

     return typeof object === "function";

   }

 

   function isString(object) {

     return _toString.call(object) == "[object String]";

   }

 

   function isNumber(object) {

     return _toString.call(object) == "[object Number]";

   }

 

   function isUndefined(object) {

     return typeof object === "undefined";

   }

 

   extend(Object, {

     extend:        extend,

     inspect:       inspect,

     toJSON:        toJSON,

     toQueryString: toQueryString,

     toHTML:        toHTML,

     keys:          keys,

     values:        values,

     clone:         clone,

     isElement:     isElement,

     isArray:       isArray,

     isHash:        isHash,

     isFunction:    isFunction,

     isString:      isString,

     isNumber:      isNumber,

     isUndefined:   isUndefined

   });

 })();

 Object.extend(Function.prototype, (function() {

   var slice = Array.prototype.slice;

 

   function update(array, args) {

     var arrayLength = array.length, length = args.length;

     while (length--) array[arrayLength + length] = args[length];

     return array;

   }

 

   function merge(array, args) {

     array = slice.call(array, 0);

     return update(array, args);

   }

 

   function argumentNames() {

     var names = this.toString().match(/^[\s\(]*function[^(]*\(([^)]*)\)/)[1]

       .replace(/\/\/.*?[\r\n]|\/\*(?:.|[\r\n])*?\*\//g, '')

       .replace(/\s+/g, '').split(',');

     return names.length == 1 && !names[0] ? [] : names;

   }

 

   function bind(context) {

     if (arguments.length < 2 && Object.isUndefined(arguments[0])) return this;

     var __method = this, args = slice.call(arguments, 1);

     return function() {

       var a = merge(args, arguments);

       return __method.apply(context, a);

     }

   }

 

   function bindAsEventListener(context) {

     var __method = this, args = slice.call(arguments, 1);

     return function(event) {

       var a = update([event || window.event], args);

       return __method.apply(context, a);

     }

   }

 

   function curry() {

     if (!arguments.length) return this;

     var __method = this, args = slice.call(arguments, 0);

     return function() {

       var a = merge(args, arguments);

       return __method.apply(this, a);

     }

   }

 

   function delay(timeout) {

     var __method = this, args = slice.call(arguments, 1);

     timeout = timeout * 1000

     return window.setTimeout(function() {

       return __method.apply(__method, args);

     }, timeout);

   }

 

   function defer() {

     var args = update([0.01], arguments);

     return this.delay.apply(this, args);

   }

 

   function wrap(wrapper) {

     var __method = this;

     return function() {

       var a = update([__method.bind(this)], arguments);

       return wrapper.apply(this, a);

     }

   }

 

   function methodize() {

     if (this._methodized) return this._methodized;

     var __method = this;

     return this._methodized = function() {

       var a = update([this], arguments);

       return __method.apply(null, a);

     };

   }

 

   return {

     argumentNames:       argumentNames,

     bind:                bind,

     bindAsEventListener: bindAsEventListener,

     curry:               curry,

     delay:               delay,

     defer:               defer,

     wrap:                wrap,

     methodize:           methodize

   }

 })());

 

 

 Date.prototype.toJSON = function() {

   return '"' + this.getUTCFullYear() + '-' +

     (this.getUTCMonth() + 1).toPaddedString(2) + '-' +

     this.getUTCDate().toPaddedString(2) + 'T' +

     this.getUTCHours().toPaddedString(2) + ':' +

     this.getUTCMinutes().toPaddedString(2) + ':' +

     this.getUTCSeconds().toPaddedString(2) + 'Z"';

 };

 

 

 RegExp.prototype.match = RegExp.prototype.test;

 

 RegExp.escape = function(str) {

   return String(str).replace(/([.*+?^=!:${}()|[\]\/\\])/g, '\\$1');

 };

 var PeriodicalExecuter = Class.create({

   initialize: function(callback, frequency) {

     this.callback = callback;

     this.frequency = frequency;

     this.currentlyExecuting = false;

 

     this.registerCallback();

   },

 

   registerCallback: function() {

     this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);

   },

 

   execute: function() {

     this.callback(this);

   },

 

   stop: function() {

     if (!this.timer) return;

     clearInterval(this.timer);

     this.timer = null;

   },

 

   onTimerEvent: function() {

     if (!this.currentlyExecuting) {

       try {

         this.currentlyExecuting = true;

         this.execute();

         this.currentlyExecuting = false;

       } catch(e) {

         this.currentlyExecuting = false;

         throw e;

       }

     }

   }

 });

 Object.extend(String, {

   interpret: function(value) {

     return value == null ? '' : String(value);

   },

   specialChar: {

     '\b': '\\b',

     '\t': '\\t',

     '\n': '\\n',

     '\f': '\\f',

     '\r': '\\r',

     '\\': '\\\\'

   }

 });

 

 Object.extend(String.prototype, (function() {

 

   function prepareReplacement(replacement) {

     if (Object.isFunction(replacement)) return replacement;

     var template = new Template(replacement);

     return function(match) { return template.evaluate(match) };

   }

 

   function gsub(pattern, replacement) {

     var result = '', source = this, match;

     replacement = prepareReplacement(replacement);

 

     if (Object.isString(pattern))

       pattern = RegExp.escape(pattern);

 

     if (!(pattern.length || pattern.source)) {

       replacement = replacement('');

       return replacement + source.split('').join(replacement) + replacement;

     }

 

     while (source.length > 0) {

       if (match = source.match(pattern)) {

         result += source.slice(0, match.index);

         result += String.interpret(replacement(match));

         source  = source.slice(match.index + match[0].length);

       } else {

         result += source, source = '';

       }

     }

     return result;

   }

 

   function sub(pattern, replacement, count) {

     replacement = prepareReplacement(replacement);

     count = Object.isUndefined(count) ? 1 : count;

 

     return this.gsub(pattern, function(match) {

       if (--count < 0) return match[0];

       return replacement(match);

     });

   }

 

   function scan(pattern, iterator) {

     this.gsub(pattern, iterator);

     return String(this);

   }

 

   function truncate(length, truncation) {

     length = length || 30;

     truncation = Object.isUndefined(truncation) ? '...' : truncation;

     return this.length > length ?

       this.slice(0, length - truncation.length) + truncation : String(this);

   }

 

   function strip() {

     return this.replace(/^\s+/, '').replace(/\s+$/, '');

   }

 

   function stripTags() {

     return this.replace(/<\w+(\s+("[^"]*"|'[^']*'|[^>])+)?>|<\/\w+>/gi, '');

   }

 

   function stripScripts() {

     return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');

   }

 

   function extractScripts() {

     var matchAll = new RegExp(Prototype.ScriptFragment, 'img');

     var matchOne = new RegExp(Prototype.ScriptFragment, 'im');

     return (this.match(matchAll) || []).map(function(scriptTag) {

       return (scriptTag.match(matchOne) || ['', ''])[1];

     });

   }

 

   function evalScripts() {

     return this.extractScripts().map(function(script) { return eval(script) });

   }

 

   function escapeHTML() {

     return this.replace(/&/g,'&amp;').replace(/</g,'&lt;').replace(/>/g,'&gt;');

   }

 

   function unescapeHTML() {

     return this.stripTags().replace(/&lt;/g,'<').replace(/&gt;/g,'>').replace(/&amp;/g,'&');

   }

 

 

   function toQueryParams(separator) {

     var match = this.strip().match(/([^?#]*)(#.*)?$/);

     if (!match) return { };

 

     return match[1].split(separator || '&').inject({ }, function(hash, pair) {

       if ((pair = pair.split('='))[0]) {

         var key = decodeURIComponent(pair.shift());

         var value = pair.length > 1 ? pair.join('=') : pair[0];

         if (value != undefined) value = decodeURIComponent(value);

 

         if (key in hash) {

           if (!Object.isArray(hash[key])) hash[key] = [hash[key]];

           hash[key].push(value);

         }

         else hash[key] = value;

       }

       return hash;

     });

   }

 

   function toArray() {

     return this.split('');

   }

 

   function succ() {

     return this.slice(0, this.length - 1) +

       String.fromCharCode(this.charCodeAt(this.length - 1) + 1);

   }

 

   function times(count) {

     return count < 1 ? '' : new Array(count + 1).join(this);

   }

 

   function camelize() {

     var parts = this.split('-'), len = parts.length;

     if (len == 1) return parts[0];

 

     var camelized = this.charAt(0) == '-'

       ? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)

       : parts[0];

 

     for (var i = 1; i < len; i++)

       camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);

 

     return camelized;

   }

 

   function capitalize() {

     return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();

   }

 

   function underscore() {

     return this.replace(/::/g, '/')

                .replace(/([A-Z]+)([A-Z][a-z])/g, '$1_$2')

                .replace(/([a-z\d])([A-Z])/g, '$1_$2')

                .replace(/-/g, '_')

                .toLowerCase();

   }

 

   function dasherize() {

     return this.replace(/_/g, '-');

   }

 

   function inspect(useDoubleQuotes) {

     var escapedString = this.replace(/[\x00-\x1f\\]/g, function(character) {

       if (character in String.specialChar) {

         return String.specialChar[character];

       }

       return '\\u00' + character.charCodeAt().toPaddedString(2, 16);

     });

     if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';

     return "'" + escapedString.replace(/'/g, '\\\'') + "'";

   }

 

   function toJSON() {

     return this.inspect(true);

   }

 

   function unfilterJSON(filter) {

     return this.replace(filter || Prototype.JSONFilter, '$1');

   }

 

   function isJSON() {

     var str = this;

     if (str.blank()) return false;

     str = this.replace(/\\./g, '@').replace(/"[^"\\\n\r]*"/g, '');

     return (/^[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t]*$/).test(str);

   }

 

   function evalJSON(sanitize) {

     var json = this.unfilterJSON();

     try {

       if (!sanitize || json.isJSON()) return eval('(' + json + ')');

     } catch (e) { }

     throw new SyntaxError('Badly formed JSON string: ' + this.inspect());

   }

 

   function include(pattern) {

     return this.indexOf(pattern) > -1;

   }

 

   function startsWith(pattern) {

     return this.indexOf(pattern) === 0;

   }

 

   function endsWith(pattern) {

     var d = this.length - pattern.length;

     return d >= 0 && this.lastIndexOf(pattern) === d;

   }

 

   function empty() {

     return this == '';

   }

 

   function blank() {

     return /^\s*$/.test(this);

   }

 

   function interpolate(object, pattern) {

     return new Template(this, pattern).evaluate(object);

   }

 

   return {

     gsub:           gsub,

     sub:            sub,

     scan:           scan,

     truncate:       truncate,

     strip:          String.prototype.trim ? String.prototype.trim : strip,

     stripTags:      stripTags,

     stripScripts:   stripScripts,

     extractScripts: extractScripts,

     evalScripts:    evalScripts,

     escapeHTML:     escapeHTML,

     unescapeHTML:   unescapeHTML,

     toQueryParams:  toQueryParams,

     parseQuery:     toQueryParams,

     toArray:        toArray,

     succ:           succ,

     times:          times,

     camelize:       camelize,

     capitalize:     capitalize,

     underscore:     underscore,

     dasherize:      dasherize,

     inspect:        inspect,

     toJSON:         toJSON,

     unfilterJSON:   unfilterJSON,

     isJSON:         isJSON,

     evalJSON:       evalJSON,

     include:        include,

     startsWith:     startsWith,

     endsWith:       endsWith,

     empty:          empty,

     blank:          blank,

     interpolate:    interpolate

   };

 })());

 

 var Template = Class.create({

   initialize: function(template, pattern) {

     this.template = template.toString();

     this.pattern = pattern || Template.Pattern;

   },

 

   evaluate: function(object) {

     if (object && Object.isFunction(object.toTemplateReplacements))

       object = object.toTemplateReplacements();

 

     return this.template.gsub(this.pattern, function(match) {

       if (object == null) return (match[1] + '');

 

       var before = match[1] || '';

       if (before == '\\') return match[2];

 

       var ctx = object, expr = match[3];

       var pattern = /^([^.[]+|\[((?:.*?[^\\])?)\])(\.|\[|$)/;

       match = pattern.exec(expr);

       if (match == null) return before;

 

       while (match != null) {

         var comp = match[1].startsWith('[') ? match[2].replace(/\\\\]/g, ']') : match[1];

         ctx = ctx[comp];

         if (null == ctx || '' == match[3]) break;

         expr = expr.substring('[' == match[3] ? match[1].length : match[0].length);

         match = pattern.exec(expr);

       }

 

       return before + String.interpret(ctx);

     });

   }

 });

 Template.Pattern = /(^|.|\r|\n)(#\{(.*?)\})/;

 

 var $break = { };

 

 var Enumerable = (function() {

   function each(iterator, context) {

     var index = 0;

     try {

       this._each(function(value) {

         iterator.call(context, value, index++);

       });

     } catch (e) {

       if (e != $break) throw e;

     }

     return this;

   }

 

   function eachSlice(number, iterator, context) {

     var index = -number, slices = [], array = this.toArray();

     if (number < 1) return array;

     while ((index += number) < array.length)

       slices.push(array.slice(index, index+number));

     return slices.collect(iterator, context);

   }

 

   function all(iterator, context) {

     iterator = iterator || Prototype.K;

     var result = true;

     this.each(function(value, index) {

       result = result && !!iterator.call(context, value, index);

       if (!result) throw $break;

     });

     return result;

   }

 

   function any(iterator, context) {

     iterator = iterator || Prototype.K;

     var result = false;

     this.each(function(value, index) {

       if (result = !!iterator.call(context, value, index))

         throw $break;

     });

     return result;

   }

 

   function collect(iterator, context) {

     iterator = iterator || Prototype.K;

     var results = [];

     this.each(function(value, index) {

       results.push(iterator.call(context, value, index));

     });

     return results;

   }

 

   function detect(iterator, context) {

     var result;

     this.each(function(value, index) {

       if (iterator.call(context, value, index)) {

         result = value;

         throw $break;

       }

     });

     return result;

   }

 

   function findAll(iterator, context) {

     var results = [];

     this.each(function(value, index) {

       if (iterator.call(context, value, index))

         results.push(value);

     });

     return results;

   }

 

   function grep(filter, iterator, context) {

     iterator = iterator || Prototype.K;

     var results = [];

 

     if (Object.isString(filter))

       filter = new RegExp(RegExp.escape(filter));

 

     this.each(function(value, index) {

       if (filter.match(value))

         results.push(iterator.call(context, value, index));

     });

     return results;

   }

 

   function include(object) {

     if (Object.isFunction(this.indexOf))

       if (this.indexOf(object) != -1) return true;

 

     var found = false;

     this.each(function(value) {

       if (value == object) {

         found = true;

         throw $break;

       }

     });

     return found;

   }

 

   function inGroupsOf(number, fillWith) {

     fillWith = Object.isUndefined(fillWith) ? null : fillWith;

     return this.eachSlice(number, function(slice) {

       while(slice.length < number) slice.push(fillWith);

       return slice;

     });

   }

 

   function inject(memo, iterator, context) {

     this.each(function(value, index) {

       memo = iterator.call(context, memo, value, index);

     });

     return memo;

   }

 

   function invoke(method) {

     var args = $A(arguments).slice(1);

     return this.map(function(value) {

       return value[method].apply(value, args);

     });

   }

 

   function max(iterator, context) {

     iterator = iterator || Prototype.K;

     var result;

     this.each(function(value, index) {

       value = iterator.call(context, value, index);

       if (result == null || value >= result)

         result = value;

     });

     return result;

   }

 

   function min(iterator, context) {

     iterator = iterator || Prototype.K;

     var result;

     this.each(function(value, index) {

       value = iterator.call(context, value, index);

       if (result == null || value < result)

         result = value;

     });

     return result;

   }

 

   function partition(iterator, context) {

     iterator = iterator || Prototype.K;

     var trues = [], falses = [];

     this.each(function(value, index) {

       (iterator.call(context, value, index) ?

         trues : falses).push(value);

     });

     return [trues, falses];

   }

 

   function pluck(property) {

     var results = [];

     this.each(function(value) {

       results.push(value[property]);

     });

     return results;

   }

 

   function reject(iterator, context) {

     var results = [];

     this.each(function(value, index) {

       if (!iterator.call(context, value, index))

         results.push(value);

     });

     return results;

   }

 

   function sortBy(iterator, context) {

     return this.map(function(value, index) {

       return {

         value: value,

         criteria: iterator.call(context, value, index)

       };

     }).sort(function(left, right) {

       var a = left.criteria, b = right.criteria;

       return a < b ? -1 : a > b ? 1 : 0;

     }).pluck('value');

   }

 

   function toArray() {

     return this.map();

   }

 

   function zip() {

     var iterator = Prototype.K, args = $A(arguments);

     if (Object.isFunction(args.last()))

       iterator = args.pop();

 

     var collections = [this].concat(args).map($A);

     return this.map(function(value, index) {

       return iterator(collections.pluck(index));

     });

   }

 

   function size() {

     return this.toArray().length;

   }

 

   function inspect() {

     return '#<Enumerable:' + this.toArray().inspect() + '>';

   }

 

 

 

 

 

 

 

 

 

   return {

     each:       each,

     eachSlice:  eachSlice,

     all:        all,

     every:      all,

     any:        any,

     some:       any,

     collect:    collect,

     map:        collect,

     detect:     detect,

     findAll:    findAll,

     select:     findAll,

     filter:     findAll,

     grep:       grep,

     include:    include,

     member:     include,

     inGroupsOf: inGroupsOf,

     inject:     inject,

     invoke:     invoke,

     max:        max,

     min:        min,

     partition:  partition,

     pluck:      pluck,

     reject:     reject,

     sortBy:     sortBy,

     toArray:    toArray,

     entries:    toArray,

     zip:        zip,

     size:       size,

     inspect:    inspect,

     find:       detect

   };

 })();

 function $A(iterable) {

   if (!iterable) return [];

   if ('toArray' in Object(iterable)) return iterable.toArray();

   var length = iterable.length || 0, results = new Array(length);

   while (length--) results[length] = iterable[length];

   return results;

 }

 

 function $w(string) {

   if (!Object.isString(string)) return [];

   string = string.strip();

   return string ? string.split(/\s+/) : [];

 }

 

 Array.from = $A;

 

 

 (function() {

   var arrayProto = Array.prototype,

       slice = arrayProto.slice,

       _each = arrayProto.forEach; // use native browser JS 1.6 implementation if available

 

   function each(iterator) {

     for (var i = 0, length = this.length; i < length; i++)

       iterator(this[i]);

   }

   if (!_each) _each = each;

 

   function clear() {

     this.length = 0;

     return this;

   }

 

   function first() {

     return this[0];

   }

 

   function last() {

     return this[this.length - 1];

   }

 

   function compact() {

     return this.select(function(value) {

       return value != null;

     });

   }

 

   function flatten() {

     return this.inject([], function(array, value) {

       if (Object.isArray(value))

         return array.concat(value.flatten());

       array.push(value);

       return array;

     });

   }

 

   function without() {

     var values = slice.call(arguments, 0);

     return this.select(function(value) {

       return !values.include(value);

     });

   }

 

   function reverse(inline) {

     return (inline !== false ? this : this.toArray())._reverse();

   }

 

   function uniq(sorted) {

     return this.inject([], function(array, value, index) {

       if (0 == index || (sorted ? array.last() != value : !array.include(value)))

         array.push(value);

       return array;

     });

   }

 

   function intersect(array) {

     return this.uniq().findAll(function(item) {

       return array.detect(function(value) { return item === value });

     });

   }

 

 

   function clone() {

     return slice.call(this, 0);

   }

 

   function size() {

     return this.length;

   }

 

   function inspect() {

     return '[' + this.map(Object.inspect).join(', ') + ']';

   }

 

   function toJSON() {

     var results = [];

     this.each(function(object) {

       var value = Object.toJSON(object);

       if (!Object.isUndefined(value)) results.push(value);

     });

     return '[' + results.join(', ') + ']';

   }

 

   function indexOf(item, i) {

     i || (i = 0);

     var length = this.length;

     if (i < 0) i = length + i;

     for (; i < length; i++)

       if (this[i] === item) return i;

     return -1;

   }

 

   function lastIndexOf(item, i) {

     i = isNaN(i) ? this.length : (i < 0 ? this.length + i : i) + 1;

     var n = this.slice(0, i).reverse().indexOf(item);

     return (n < 0) ? n : i - n - 1;

   }

 

   function concat() {

     var array = slice.call(this, 0), item;

     for (var i = 0, length = arguments.length; i < length; i++) {

       item = arguments[i];

       if (Object.isArray(item) && !('callee' in item)) {

         for (var j = 0, arrayLength = item.length; j < arrayLength; j++)

           array.push(item[j]);

       } else {

         array.push(item);

       }

     }

     return array;

   }

 

   Object.extend(arrayProto, Enumerable);

 

   if (!arrayProto._reverse)

     arrayProto._reverse = arrayProto.reverse;

 

   Object.extend(arrayProto, {

     _each:     _each,

     clear:     clear,

     first:     first,

     last:      last,

     compact:   compact,

     flatten:   flatten,

     without:   without,

     reverse:   reverse,

     uniq:      uniq,

     intersect: intersect,

     clone:     clone,

     toArray:   clone,

     size:      size,

     inspect:   inspect,

     toJSON:    toJSON

   });

 

   var CONCAT_ARGUMENTS_BUGGY = (function() {

     return [].concat(arguments)[0][0] !== 1;

   })(1,2)

 

   if (CONCAT_ARGUMENTS_BUGGY) arrayProto.concat = concat;

 

   if (!arrayProto.indexOf) arrayProto.indexOf = indexOf;

   if (!arrayProto.lastIndexOf) arrayProto.lastIndexOf = lastIndexOf;

 })();

 function $H(object) {

   return new Hash(object);

 };

 

 var Hash = Class.create(Enumerable, (function() {

   function initialize(object) {

     this._object = Object.isHash(object) ? object.toObject() : Object.clone(object);

   }

 

   function _each(iterator) {

     for (var key in this._object) {

       var value = this._object[key], pair = [key, value];

       pair.key = key;

       pair.value = value;

       iterator(pair);

     }

   }

 

   function set(key, value) {

     return this._object[key] = value;

   }

 

   function get(key) {

     if (this._object[key] !== Object.prototype[key])

       return this._object[key];

   }

 

   function unset(key) {

     var value = this._object[key];

     delete this._object[key];

     return value;

   }

 

   function toObject() {

     return Object.clone(this._object);

   }

 

   function keys() {

     return this.pluck('key');

   }

 

   function values() {

     return this.pluck('value');

   }

 

   function index(value) {

     var match = this.detect(function(pair) {

       return pair.value === value;

     });

     return match && match.key;

   }

 

   function merge(object) {

     return this.clone().update(object);

   }

 

   function update(object) {

     return new Hash(object).inject(this, function(result, pair) {

       result.set(pair.key, pair.value);

       return result;

     });

   }

 

   function toQueryPair(key, value) {

     if (Object.isUndefined(value)) return key;

     return key + '=' + encodeURIComponent(String.interpret(value));

   }

 

   function toQueryString() {

     return this.inject([], function(results, pair) {

       var key = encodeURIComponent(pair.key), values = pair.value;

 

       if (values && typeof values == 'object') {

         if (Object.isArray(values))

           return results.concat(values.map(toQueryPair.curry(key)));

       } else results.push(toQueryPair(key, values));

       return results;

     }).join('&');

   }

 

   function inspect() {

     return '#<Hash:{' + this.map(function(pair) {

       return pair.map(Object.inspect).join(': ');

     }).join(', ') + '}>';

   }

 

   function toJSON() {

     return Object.toJSON(this.toObject());

   }

 

   function clone() {

     return new Hash(this);

   }

 

   return {

     initialize:             initialize,

     _each:                  _each,

     set:                    set,

     get:                    get,

     unset:                  unset,

     toObject:               toObject,

     toTemplateReplacements: toObject,

     keys:                   keys,

     values:                 values,

     index:                  index,

     merge:                  merge,

     update:                 update,

     toQueryString:          toQueryString,

     inspect:                inspect,

     toJSON:                 toJSON,

     clone:                  clone

   };

 })());

 

 Hash.from = $H;

 Object.extend(Number.prototype, (function() {

   function toColorPart() {

     return this.toPaddedString(2, 16);

   }

 

   function succ() {

     return this + 1;

   }

 

   function times(iterator, context) {

     $R(0, this, true).each(iterator, context);

     return this;

   }

 

   function toPaddedString(length, radix) {

     var string = this.toString(radix || 10);

     return '0'.times(length - string.length) + string;

   }

 

   function toJSON() {

     return isFinite(this) ? this.toString() : 'null';

   }

 

   function abs() {

     return Math.abs(this);

   }

 

   function round() {

     return Math.round(this);

   }

 

   function ceil() {

     return Math.ceil(this);

   }

 

   function floor() {

     return Math.floor(this);

   }

 

   return {

     toColorPart:    toColorPart,

     succ:           succ,

     times:          times,

     toPaddedString: toPaddedString,

     toJSON:         toJSON,

     abs:            abs,

     round:          round,

     ceil:           ceil,

     floor:          floor

   };

 })());

 

 function $R(start, end, exclusive) {

   return new ObjectRange(start, end, exclusive);

 }

 

 var ObjectRange = Class.create(Enumerable, (function() {

   function initialize(start, end, exclusive) {

     this.start = start;

     this.end = end;

     this.exclusive = exclusive;

   }

 

   function _each(iterator) {

     var value = this.start;

     while (this.include(value)) {

       iterator(value);

       value = value.succ();

     }

   }

 

   function include(value) {

     if (value < this.start)

       return false;

     if (this.exclusive)

       return value < this.end;

     return value <= this.end;

   }

 

   return {

     initialize: initialize,

     _each:      _each,

     include:    include

   };

 })());

 

 

 

 var Ajax = {

   getTransport: function() {

     return Try.these(

       function() {return new XMLHttpRequest()},

       function() {return new ActiveXObject('Msxml2.XMLHTTP')},

       function() {return new ActiveXObject('Microsoft.XMLHTTP')}

     ) || false;

   },

 

   activeRequestCount: 0

 };

 

 Ajax.Responders = {

   responders: [],

 

   _each: function(iterator) {

     this.responders._each(iterator);

   },

 

   register: function(responder) {

     if (!this.include(responder))

       this.responders.push(responder);

   },

 

   unregister: function(responder) {

     this.responders = this.responders.without(responder);

   },

 

   dispatch: function(callback, request, transport, json) {

     this.each(function(responder) {

       if (Object.isFunction(responder[callback])) {

         try {

           responder[callback].apply(responder, [request, transport, json]);

         } catch (e) { }

       }

     });

   }

 };

 

 Object.extend(Ajax.Responders, Enumerable);

 

 Ajax.Responders.register({

   onCreate:   function() { Ajax.activeRequestCount++ },

   onComplete: function() { Ajax.activeRequestCount-- }

 });

 Ajax.Base = Class.create({

   initialize: function(options) {

     this.options = {

       method:       'post',

       asynchronous: true,

       contentType:  'application/x-www-form-urlencoded',

       encoding:     'UTF-8',

       parameters:   '',

       evalJSON:     true,

       evalJS:       true

     };

     Object.extend(this.options, options || { });

 

     this.options.method = this.options.method.toLowerCase();

 

     if (Object.isString(this.options.parameters))

       this.options.parameters = this.options.parameters.toQueryParams();

     else if (Object.isHash(this.options.parameters))

       this.options.parameters = this.options.parameters.toObject();

   }

 });

 Ajax.Request = Class.create(Ajax.Base, {

   _complete: false,

 

   initialize: function($super, url, options) {

     $super(options);

     this.transport = Ajax.getTransport();

     this.request(url);

   },

 

   request: function(url) {

     this.url = url;

     this.method = this.options.method;

     var params = Object.clone(this.options.parameters);

 

     if (!['get', 'post'].include(this.method)) {

       params['_method'] = this.method;

       this.method = 'post';

     }

 

     this.parameters = params;

 

     if (params = Object.toQueryString(params)) {

       if (this.method == 'get')

         this.url += (this.url.include('?') ? '&' : '?') + params;

       else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))

         params += '&_=';

     }

 

     try {

       var response = new Ajax.Response(this);

       if (this.options.onCreate) this.options.onCreate(response);

       Ajax.Responders.dispatch('onCreate', this, response);

 

       this.transport.open(this.method.toUpperCase(), this.url,

         this.options.asynchronous);

 

       if (this.options.asynchronous) this.respondToReadyState.bind(this).defer(1);

 

       this.transport.onreadystatechange = this.onStateChange.bind(this);

       this.setRequestHeaders();

 

       this.body = this.method == 'post' ? (this.options.postBody || params) : null;

       this.transport.send(this.body);

 

       /* Force Firefox to handle ready state 4 for synchronous requests */

       if (!this.options.asynchronous && this.transport.overrideMimeType)

         this.onStateChange();

 

     }

     catch (e) {

       this.dispatchException(e);

     }

   },

 

   onStateChange: function() {

     var readyState = this.transport.readyState;

     if (readyState > 1 && !((readyState == 4) && this._complete))

       this.respondToReadyState(this.transport.readyState);

   },

 

   setRequestHeaders: function() {

     var headers = {

       'X-Requested-With': 'XMLHttpRequest',

       'X-Prototype-Version': Prototype.Version,

       'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'

     };

 

     if (this.method == 'post') {

       headers['Content-type'] = this.options.contentType +

         (this.options.encoding ? '; charset=' + this.options.encoding : '');

 

       /* Force "Connection: close" for older Mozilla browsers to work

        * around a bug where XMLHttpRequest sends an incorrect

        * Content-length header. See Mozilla Bugzilla #246651.

        */

       if (this.transport.overrideMimeType &&

           (navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)

             headers['Connection'] = 'close';

     }

 

     if (typeof this.options.requestHeaders == 'object') {

       var extras = this.options.requestHeaders;

 

       if (Object.isFunction(extras.push))

         for (var i = 0, length = extras.length; i < length; i += 2)

           headers[extras[i]] = extras[i+1];

       else

         $H(extras).each(function(pair) { headers[pair.key] = pair.value });

     }

 

     for (var name in headers)

       this.transport.setRequestHeader(name, headers[name]);

   },

 

   success: function() {

     var status = this.getStatus();

     return !status || (status >= 200 && status < 300);

   },

 

   getStatus: function() {

     try {

       return this.transport.status || 0;

     } catch (e) { return 0 }

   },

 

   respondToReadyState: function(readyState) {

     var state = Ajax.Request.Events[readyState], response = new Ajax.Response(this);

 

     if (state == 'Complete') {

       try {

         this._complete = true;

         (this.options['on' + response.status]

          || this.options['on' + (this.success() ? 'Success' : 'Failure')]

          || Prototype.emptyFunction)(response, response.headerJSON);

       } catch (e) {

         this.dispatchException(e);

       }

 

       var contentType = response.getHeader('Content-type');

       if (this.options.evalJS == 'force'

           || (this.options.evalJS && this.isSameOrigin() && contentType

           && contentType.match(/^\s*(text|application)\/(x-)?(java|ecma)script(;.*)?\s*$/i)))

         this.evalResponse();

     }

 

     try {

       (this.options['on' + state] || Prototype.emptyFunction)(response, response.headerJSON);

       Ajax.Responders.dispatch('on' + state, this, response, response.headerJSON);

     } catch (e) {

       this.dispatchException(e);

     }

 

     if (state == 'Complete') {

       this.transport.onreadystatechange = Prototype.emptyFunction;

     }

   },

 

   isSameOrigin: function() {

     var m = this.url.match(/^\s*https?:\/\/[^\/]*/);

     return !m || (m[0] == '#{protocol}//#{domain}#{port}'.interpolate({

       protocol: location.protocol,

       domain: document.domain,

       port: location.port ? ':' + location.port : ''

     }));

   },

 

   getHeader: function(name) {

     try {

       return this.transport.getResponseHeader(name) || null;

     } catch (e) { return null; }

   },

 

   evalResponse: function() {

     try {

       return eval((this.transport.responseText || '').unfilterJSON());

     } catch (e) {

       this.dispatchException(e);

     }

   },

 

   dispatchException: function(exception) {

     (this.options.onException || Prototype.emptyFunction)(this, exception);

     Ajax.Responders.dispatch('onException', this, exception);

   }

 });

 

 Ajax.Request.Events =

   ['Uninitialized', 'Loading', 'Loaded', 'Interactive', 'Complete'];

 

 

 

 

 

 

 

 

 Ajax.Response = Class.create({

   initialize: function(request){

     this.request = request;

     var transport  = this.transport  = request.transport,

         readyState = this.readyState = transport.readyState;

 

     if((readyState > 2 && !Prototype.Browser.IE) || readyState == 4) {

       this.status       = this.getStatus();

       this.statusText   = this.getStatusText();

       this.responseText = String.interpret(transport.responseText);

       this.headerJSON   = this._getHeaderJSON();

     }

 

     if(readyState == 4) {

       var xml = transport.responseXML;

       this.responseXML  = Object.isUndefined(xml) ? null : xml;

       this.responseJSON = this._getResponseJSON();

     }

   },

 

   status:      0,

 

   statusText: '',

 

   getStatus: Ajax.Request.prototype.getStatus,

 

   getStatusText: function() {

     try {

       return this.transport.statusText || '';

     } catch (e) { return '' }

   },

 

   getHeader: Ajax.Request.prototype.getHeader,

 

   getAllHeaders: function() {

     try {

       return this.getAllResponseHeaders();

     } catch (e) { return null }

   },

 

   getResponseHeader: function(name) {

     return this.transport.getResponseHeader(name);

   },

 

   getAllResponseHeaders: function() {

     return this.transport.getAllResponseHeaders();

   },

 

   _getHeaderJSON: function() {

     var json = this.getHeader('X-JSON');

     if (!json) return null;

     json = decodeURIComponent(escape(json));

     try {

       return json.evalJSON(this.request.options.sanitizeJSON ||

         !this.request.isSameOrigin());

     } catch (e) {

       this.request.dispatchException(e);

     }

   },

 

   _getResponseJSON: function() {

     var options = this.request.options;

     if (!options.evalJSON || (options.evalJSON != 'force' &&

       !(this.getHeader('Content-type') || '').include('application/json')) ||

         this.responseText.blank())

           return null;

     try {

       return this.responseText.evalJSON(options.sanitizeJSON ||

         !this.request.isSameOrigin());

     } catch (e) {

       this.request.dispatchException(e);

     }

   }

 });

 

 Ajax.Updater = Class.create(Ajax.Request, {

   initialize: function($super, container, url, options) {

     this.container = {

       success: (container.success || container),

       failure: (container.failure || (container.success ? null : container))

     };

 

     options = Object.clone(options);

     var onComplete = options.onComplete;

     options.onComplete = (function(response, json) {

       this.updateContent(response.responseText);

       if (Object.isFunction(onComplete)) onComplete(response, json);

     }).bind(this);

 

     $super(url, options);

   },

 

   updateContent: function(responseText) {

     var receiver = this.container[this.success() ? 'success' : 'failure'],

         options = this.options;

 

     if (!options.evalScripts) responseText = responseText.stripScripts();

 

     if (receiver = $(receiver)) {

       if (options.insertion) {

         if (Object.isString(options.insertion)) {

           var insertion = { }; insertion[options.insertion] = responseText;

           receiver.insert(insertion);

         }

         else options.insertion(receiver, responseText);

       }

       else receiver.update(responseText);

     }

   }

 });

 

 Ajax.PeriodicalUpdater = Class.create(Ajax.Base, {

   initialize: function($super, container, url, options) {

     $super(options);

     this.onComplete = this.options.onComplete;

 

     this.frequency = (this.options.frequency || 2);

     this.decay = (this.options.decay || 1);

 

     this.updater = { };

     this.container = container;

     this.url = url;

 

     this.start();

   },

 

   start: function() {

     this.options.onComplete = this.updateComplete.bind(this);

     this.onTimerEvent();

   },

 

   stop: function() {

     this.updater.options.onComplete = undefined;

     clearTimeout(this.timer);

     (this.onComplete || Prototype.emptyFunction).apply(this, arguments);

   },

 

   updateComplete: function(response) {

     if (this.options.decay) {

       this.decay = (response.responseText == this.lastText ?

         this.decay * this.options.decay : 1);

 

       this.lastText = response.responseText;

     }

     this.timer = this.onTimerEvent.bind(this).delay(this.decay * this.frequency);

   },

 

   onTimerEvent: function() {

     this.updater = new Ajax.Updater(this.container, this.url, this.options);

   }

 });

 

 

 

 function $(element) {

   if (arguments.length > 1) {

     for (var i = 0, elements = [], length = arguments.length; i < length; i++)

       elements.push($(arguments[i]));

     return elements;

   }

   if (Object.isString(element))

     element = document.getElementById(element);

   return Element.extend(element);

 }

 

 if (Prototype.BrowserFeatures.XPath) {

   document._getElementsByXPath = function(expression, parentElement) {

     var results = [];

     var query = document.evaluate(expression, $(parentElement) || document,

       null, XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);

     for (var i = 0, length = query.snapshotLength; i < length; i++)

       results.push(Element.extend(query.snapshotItem(i)));

     return results;

   };

 }

 

 /*--------------------------------------------------------------------------*/

 

 if (!window.Node) var Node = { };

 

 if (!Node.ELEMENT_NODE) {

   Object.extend(Node, {

     ELEMENT_NODE: 1,

     ATTRIBUTE_NODE: 2,

     TEXT_NODE: 3,

     CDATA_SECTION_NODE: 4,

     ENTITY_REFERENCE_NODE: 5,

     ENTITY_NODE: 6,

     PROCESSING_INSTRUCTION_NODE: 7,

     COMMENT_NODE: 8,

     DOCUMENT_NODE: 9,

     DOCUMENT_TYPE_NODE: 10,

     DOCUMENT_FRAGMENT_NODE: 11,

     NOTATION_NODE: 12

   });

 }

 

 

 (function(global) {

 

   var SETATTRIBUTE_IGNORES_NAME = (function(){

     var elForm = document.createElement("form");

     var elInput = document.createElement("input");

     var root = document.documentElement;

     elInput.setAttribute("name", "test");

     elForm.appendChild(elInput);

     root.appendChild(elForm);

     var isBuggy = elForm.elements

       ? (typeof elForm.elements.test == "undefined")

       : null;

     root.removeChild(elForm);

     elForm = elInput = null;

     return isBuggy;

   })();

 

   var element = global.Element;

   global.Element = function(tagName, attributes) {

     attributes = attributes || { };

     tagName = tagName.toLowerCase();

     var cache = Element.cache;

     if (SETATTRIBUTE_IGNORES_NAME && attributes.name) {

       tagName = '<' + tagName + ' name="' + attributes.name + '">';

       delete attributes.name;

       return Element.writeAttribute(document.createElement(tagName), attributes);

     }

     if (!cache[tagName]) cache[tagName] = Element.extend(document.createElement(tagName));

     return Element.writeAttribute(cache[tagName].cloneNode(false), attributes);

   };

   Object.extend(global.Element, element || { });

   if (element) global.Element.prototype = element.prototype;

 })(this);

 

 Element.cache = { };

 Element.idCounter = 1;

 

 Element.Methods = {

   visible: function(element) {

     return $(element).style.display != 'none';

   },

 

   toggle: function(element) {

     element = $(element);

     Element[Element.visible(element) ? 'hide' : 'show'](element);

     return element;

   },

 

 

   hide: function(element) {

     element = $(element);

     element.style.display = 'none';

     return element;

   },

 

   show: function(element) {

     element = $(element);

     element.style.display = '';

     return element;

   },

 

   remove: function(element) {

     element = $(element);

     element.parentNode.removeChild(element);

     return element;

   },

 

   update: (function(){

 

     var SELECT_ELEMENT_INNERHTML_BUGGY = (function(){

       var el = document.createElement("select"),

           isBuggy = true;

       el.innerHTML = "<option value=\"test\">test</option>";

       if (el.options && el.options[0]) {

         isBuggy = el.options[0].nodeName.toUpperCase() !== "OPTION";

       }

       el = null;

       return isBuggy;

     })();

 

     var TABLE_ELEMENT_INNERHTML_BUGGY = (function(){

       try {

         var el = document.createElement("table");

         if (el && el.tBodies) {

           el.innerHTML = "<tbody><tr><td>test</td></tr></tbody>";

           var isBuggy = typeof el.tBodies[0] == "undefined";

           el = null;

           return isBuggy;

         }

       } catch (e) {

         return true;

       }

     })();

 

     var SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING = (function () {

       var s = document.createElement("script"),

           isBuggy = false;

       try {

         s.appendChild(document.createTextNode(""));

         isBuggy = !s.firstChild ||

           s.firstChild && s.firstChild.nodeType !== 3;

       } catch (e) {

         isBuggy = true;

       }

       s = null;

       return isBuggy;

     })();

 

     function update(element, content) {

       element = $(element);

 

       if (content && content.toElement)

         content = content.toElement();

 

       if (Object.isElement(content))

         return element.update().insert(content);

 

       content = Object.toHTML(content);

 

       var tagName = element.tagName.toUpperCase();

 

       if (tagName === 'SCRIPT' && SCRIPT_ELEMENT_REJECTS_TEXTNODE_APPENDING) {

         element.text = content;

         return element;

       }

 

       if (SELECT_ELEMENT_INNERHTML_BUGGY || TABLE_ELEMENT_INNERHTML_BUGGY) {

         if (tagName in Element._insertionTranslations.tags) {

           while (element.firstChild) {

             element.removeChild(element.firstChild);

           }

           Element._getContentFromAnonymousElement(tagName, content.stripScripts())

             .each(function(node) {

               element.appendChild(node)

             });

         }

         else {

           element.innerHTML = content.stripScripts();

         }

       }

       else {

         element.innerHTML = content.stripScripts();

       }

 

       content.evalScripts.bind(content).defer();

       return element;

     }

 

     return update;

   })(),

 

   replace: function(element, content) {

     element = $(element);

     if (content && content.toElement) content = content.toElement();

     else if (!Object.isElement(content)) {

       content = Object.toHTML(content);

       var range = element.ownerDocument.createRange();

       range.selectNode(element);

       content.evalScripts.bind(content).defer();

       content = range.createContextualFragment(content.stripScripts());

     }

     element.parentNode.replaceChild(content, element);

     return element;

   },

 

   insert: function(element, insertions) {

     element = $(element);

 

     if (Object.isString(insertions) || Object.isNumber(insertions) ||

         Object.isElement(insertions) || (insertions && (insertions.toElement || insertions.toHTML)))

           insertions = {bottom:insertions};

 

     var content, insert, tagName, childNodes;

 

     for (var position in insertions) {

       content  = insertions[position];

       position = position.toLowerCase();

       insert = Element._insertionTranslations[position];

 

       if (content && content.toElement) content = content.toElement();

       if (Object.isElement(content)) {

         insert(element, content);

         continue;

       }

 

       content = Object.toHTML(content);

 

       tagName = ((position == 'before' || position == 'after')

         ? element.parentNode : element).tagName.toUpperCase();

 

       childNodes = Element._getContentFromAnonymousElement(tagName, content.stripScripts());

 

       if (position == 'top' || position == 'after') childNodes.reverse();

       childNodes.each(insert.curry(element));

 

       content.evalScripts.bind(content).defer();

     }

 

     return element;

   },

 

   wrap: function(element, wrapper, attributes) {

     element = $(element);

     if (Object.isElement(wrapper))

       $(wrapper).writeAttribute(attributes || { });

     else if (Object.isString(wrapper)) wrapper = new Element(wrapper, attributes);

     else wrapper = new Element('div', wrapper);

     if (element.parentNode)

       element.parentNode.replaceChild(wrapper, element);

     wrapper.appendChild(element);

     return wrapper;

   },

 

   inspect: function(element) {

     element = $(element);

     var result = '<' + element.tagName.toLowerCase();

     $H({'id': 'id', 'className': 'class'}).each(function(pair) {

       var property = pair.first(), attribute = pair.last();

       var value = (element[property] || '').toString();

       if (value) result += ' ' + attribute + '=' + value.inspect(true);

     });

     return result + '>';

   },

 

   recursivelyCollect: function(element, property) {

     element = $(element);

     var elements = [];

     while (element = element[property])

       if (element.nodeType == 1)

         elements.push(Element.extend(element));

     return elements;

   },

 

   ancestors: function(element) {

     return Element.recursivelyCollect(element, 'parentNode');

   },

 

   descendants: function(element) {

     return Element.select(element, "*");

   },

 

   firstDescendant: function(element) {

     element = $(element).firstChild;

     while (element && element.nodeType != 1) element = element.nextSibling;

     return $(element);

   },

 

   immediateDescendants: function(element) {

     if (!(element = $(element).firstChild)) return [];

     while (element && element.nodeType != 1) element = element.nextSibling;

     if (element) return [element].concat($(element).nextSiblings());

     return [];

   },

 

   previousSiblings: function(element) {

     return Element.recursivelyCollect(element, 'previousSibling');

   },

 

   nextSiblings: function(element) {

     return Element.recursivelyCollect(element, 'nextSibling');

   },

 

   siblings: function(element) {

     element = $(element);

     return Element.previousSiblings(element).reverse()

       .concat(Element.nextSiblings(element));

   },

 

   match: function(element, selector) {

     if (Object.isString(selector))

       selector = new Selector(selector);

     return selector.match($(element));

   },

 

   up: function(element, expression, index) {

     element = $(element);

     if (arguments.length == 1) return $(element.parentNode);

     var ancestors = Element.ancestors(element);

     return Object.isNumber(expression) ? ancestors[expression] :

       Selector.findElement(ancestors, expression, index);

   },

 

   down: function(element, expression, index) {

     element = $(element);

     if (arguments.length == 1) return Element.firstDescendant(element);

     return Object.isNumber(expression) ? Element.descendants(element)[expression] :

       Element.select(element, expression)[index || 0];

   },

 

   previous: function(element, expression, index) {

     element = $(element);

     if (arguments.length == 1) return $(Selector.handlers.previousElementSibling(element));

     var previousSiblings = Element.previousSiblings(element);

     return Object.isNumber(expression) ? previousSiblings[expression] :

       Selector.findElement(previousSiblings, expression, index);

   },

 

   next: function(element, expression, index) {

     element = $(element);

     if (arguments.length == 1) return $(Selector.handlers.nextElementSibling(element));

     var nextSiblings = Element.nextSiblings(element);

     return Object.isNumber(expression) ? nextSiblings[expression] :

       Selector.findElement(nextSiblings, expression, index);

   },

 

 

   select: function(element) {

     var args = Array.prototype.slice.call(arguments, 1);

     return Selector.findChildElements(element, args);

   },

 

   adjacent: function(element) {

     var args = Array.prototype.slice.call(arguments, 1);

     return Selector.findChildElements(element.parentNode, args).without(element);

   },

 

   identify: function(element) {

     element = $(element);

     var id = Element.readAttribute(element, 'id');

     if (id) return id;

     do { id = 'anonymous_element_' + Element.idCounter++ } while ($(id));

     Element.writeAttribute(element, 'id', id);

     return id;

   },

 

   readAttribute: function(element, name) {

     element = $(element);

     if (Prototype.Browser.IE) {

       var t = Element._attributeTranslations.read;

       if (t.values[name]) return t.values[name](element, name);

       if (t.names[name]) name = t.names[name];

       if (name.include(':')) {

         return (!element.attributes || !element.attributes[name]) ? null :

          element.attributes[name].value;

       }

     }

     return element.getAttribute(name);

   },

 

   writeAttribute: function(element, name, value) {

     element = $(element);

     var attributes = { }, t = Element._attributeTranslations.write;

 

     if (typeof name == 'object') attributes = name;

     else attributes[name] = Object.isUndefined(value) ? true : value;

 

     for (var attr in attributes) {

       name = t.names[attr] || attr;

       value = attributes[attr];

       if (t.values[attr]) name = t.values[attr](element, value);

       if (value === false || value === null)

         element.removeAttribute(name);

       else if (value === true)

         element.setAttribute(name, name);

       else element.setAttribute(name, value);

     }

     return element;

   },

 

   getHeight: function(element) {

     return Element.getDimensions(element).height;

   },

 

   getWidth: function(element) {

     return Element.getDimensions(element).width;

   },

 

   classNames: function(element) {

     return new Element.ClassNames(element);

   },

 

   hasClassName: function(element, className) {

     if (!(element = $(element))) return;

     var elementClassName = element.className;

     return (elementClassName.length > 0 && (elementClassName == className ||

       new RegExp("(^|\\s)" + className + "(\\s|$)").test(elementClassName)));

   },

 

   addClassName: function(element, className) {

     if (!(element = $(element))) return;

     if (!Element.hasClassName(element, className))

       element.className += (element.className ? ' ' : '') + className;

     return element;

   },

 

   removeClassName: function(element, className) {

     if (!(element = $(element))) return;

     element.className = element.className.replace(

       new RegExp("(^|\\s+)" + className + "(\\s+|$)"), ' ').strip();

     return element;

   },

 

   toggleClassName: function(element, className) {

     if (!(element = $(element))) return;

     return Element[Element.hasClassName(element, className) ?

       'removeClassName' : 'addClassName'](element, className);

   },

 

   cleanWhitespace: function(element) {

     element = $(element);

     var node = element.firstChild;

     while (node) {

       var nextNode = node.nextSibling;

       if (node.nodeType == 3 && !/\S/.test(node.nodeValue))

         element.removeChild(node);

       node = nextNode;

     }

     return element;

   },

 

   empty: function(element) {

     return $(element).innerHTML.blank();

   },

 

   descendantOf: function(element, ancestor) {

     element = $(element), ancestor = $(ancestor);

 

     if (element.compareDocumentPosition)

       return (element.compareDocumentPosition(ancestor) & 8) === 8;

 

     if (ancestor.contains)

       return ancestor.contains(element) && ancestor !== element;

 

     while (element = element.parentNode)

       if (element == ancestor) return true;

 

     return false;

   },

 

   scrollTo: function(element) {

     element = $(element);

     var pos = Element.cumulativeOffset(element);

     window.scrollTo(pos[0], pos[1]);

     return element;

   },

 

   getStyle: function(element, style) {

     element = $(element);

     style = style == 'float' ? 'cssFloat' : style.camelize();

     var value = element.style[style];

     if (!value || value == 'auto') {

       var css = document.defaultView.getComputedStyle(element, null);

       value = css ? css[style] : null;

     }

     if (style == 'opacity') return value ? parseFloat(value) : 1.0;

     return value == 'auto' ? null : value;

   },

 

   getOpacity: function(element) {

     return $(element).getStyle('opacity');

   },

 

   setStyle: function(element, styles) {

     element = $(element);

     var elementStyle = element.style, match;

     if (Object.isString(styles)) {

       element.style.cssText += ';' + styles;

       return styles.include('opacity') ?

         element.setOpacity(styles.match(/opacity:\s*(\d?\.?\d*)/)[1]) : element;

     }

     for (var property in styles)

       if (property == 'opacity') element.setOpacity(styles[property]);

       else

         elementStyle[(property == 'float' || property == 'cssFloat') ?

           (Object.isUndefined(elementStyle.styleFloat) ? 'cssFloat' : 'styleFloat') :

             property] = styles[property];

 

     return element;

   },

 

   setOpacity: function(element, value) {

     element = $(element);

     element.style.opacity = (value == 1 || value === '') ? '' :

       (value < 0.00001) ? 0 : value;

     return element;

   },

 

   getDimensions: function(element) {

     element = $(element);

     var display = Element.getStyle(element, 'display');

     if (display != 'none' && display != null) // Safari bug

       return {width: element.offsetWidth, height: element.offsetHeight};

 

     var els = element.style;

     var originalVisibility = els.visibility;

     var originalPosition = els.position;

     var originalDisplay = els.display;

     els.visibility = 'hidden';

     if (originalPosition != 'fixed') // Switching fixed to absolute causes issues in Safari

       els.position = 'absolute';

     els.display = 'block';

     var originalWidth = element.clientWidth;

     var originalHeight = element.clientHeight;

     els.display = originalDisplay;

     els.position = originalPosition;

     els.visibility = originalVisibility;

     return {width: originalWidth, height: originalHeight};

   },

 

   makePositioned: function(element) {

     element = $(element);

     var pos = Element.getStyle(element, 'position');

     if (pos == 'static' || !pos) {

       element._madePositioned = true;

       element.style.position = 'relative';

       if (Prototype.Browser.Opera) {

         element.style.top = 0;

         element.style.left = 0;

       }

     }

     return element;

   },

 

   undoPositioned: function(element) {

     element = $(element);

     if (element._madePositioned) {

       element._madePositioned = undefined;

       element.style.position =

         element.style.top =

         element.style.left =

         element.style.bottom =

         element.style.right = '';

     }

     return element;

   },

 

   makeClipping: function(element) {

     element = $(element);

     if (element._overflow) return element;

     element._overflow = Element.getStyle(element, 'overflow') || 'auto';

     if (element._overflow !== 'hidden')

       element.style.overflow = 'hidden';

     return element;

   },

 

   undoClipping: function(element) {

     element = $(element);

     if (!element._overflow) return element;

     element.style.overflow = element._overflow == 'auto' ? '' : element._overflow;

     element._overflow = null;

     return element;

   },

 

   cumulativeOffset: function(element) {

     var valueT = 0, valueL = 0;

     do {

       valueT += element.offsetTop  || 0;

       valueL += element.offsetLeft || 0;

       element = element.offsetParent;

     } while (element);

     return Element._returnOffset(valueL, valueT);

   },

 

   positionedOffset: function(element) {

     var valueT = 0, valueL = 0;

     do {

       valueT += element.offsetTop  || 0;

       valueL += element.offsetLeft || 0;

       element = element.offsetParent;

       if (element) {

         if (element.tagName.toUpperCase() == 'BODY') break;

         var p = Element.getStyle(element, 'position');

         if (p !== 'static') break;

       }

     } while (element);

     return Element._returnOffset(valueL, valueT);

   },

 

   absolutize: function(element) {

     element = $(element);

     if (Element.getStyle(element, 'position') == 'absolute') return element;

 

     var offsets = Element.positionedOffset(element);

     var top     = offsets[1];

     var left    = offsets[0];

     var width   = element.clientWidth;

     var height  = element.clientHeight;

 

     element._originalLeft   = left - parseFloat(element.style.left  || 0);

     element._originalTop    = top  - parseFloat(element.style.top || 0);

     element._originalWidth  = element.style.width;

     element._originalHeight = element.style.height;

 

     element.style.position = 'absolute';

     element.style.top    = top + 'px';

     element.style.left   = left + 'px';

     element.style.width  = width + 'px';

     element.style.height = height + 'px';

     return element;

   },

 

   relativize: function(element) {

     element = $(element);

     if (Element.getStyle(element, 'position') == 'relative') return element;

 

     element.style.position = 'relative';

     var top  = parseFloat(element.style.top  || 0) - (element._originalTop || 0);

     var left = parseFloat(element.style.left || 0) - (element._originalLeft || 0);

 

     element.style.top    = top + 'px';

     element.style.left   = left + 'px';

     element.style.height = element._originalHeight;

     element.style.width  = element._originalWidth;

     return element;

   },

 

   cumulativeScrollOffset: function(element) {

     var valueT = 0, valueL = 0;

     do {

       valueT += element.scrollTop  || 0;

       valueL += element.scrollLeft || 0;

       element = element.parentNode;

     } while (element);

     return Element._returnOffset(valueL, valueT);

   },

 

   getOffsetParent: function(element) {

     if (element.offsetParent) return $(element.offsetParent);

     if (element == document.body) return $(element);

 

     while ((element = element.parentNode) && element != document.body)

       if (Element.getStyle(element, 'position') != 'static')

         return $(element);

 

     return $(document.body);

   },

 

   viewportOffset: function(forElement) {

     var valueT = 0, valueL = 0;

 

     var element = forElement;

     do {

       valueT += element.offsetTop  || 0;

       valueL += element.offsetLeft || 0;

 

       if (element.offsetParent == document.body &&

         Element.getStyle(element, 'position') == 'absolute') break;

 

     } while (element = element.offsetParent);

 

     element = forElement;

     do {

       if (!Prototype.Browser.Opera || (element.tagName && (element.tagName.toUpperCase() == 'BODY'))) {

         valueT -= element.scrollTop  || 0;

         valueL -= element.scrollLeft || 0;

       }

     } while (element = element.parentNode);

 

     return Element._returnOffset(valueL, valueT);

   },

 

   clonePosition: function(element, source) {

     var options = Object.extend({

       setLeft:    true,

       setTop:     true,

       setWidth:   true,

       setHeight:  true,

       offsetTop:  0,

       offsetLeft: 0

     }, arguments[2] || { });

 

     source = $(source);

     var p = Element.viewportOffset(source);

 

     element = $(element);

     var delta = [0, 0];

     var parent = null;

     if (Element.getStyle(element, 'position') == 'absolute') {

       parent = Element.getOffsetParent(element);

       delta = Element.viewportOffset(parent);

     }

 

     if (parent == document.body) {

       delta[0] -= document.body.offsetLeft;

       delta[1] -= document.body.offsetTop;

     }

 

     if (options.setLeft)   element.style.left  = (p[0] - delta[0] + options.offsetLeft) + 'px';

     if (options.setTop)    element.style.top   = (p[1] - delta[1] + options.offsetTop) + 'px';

     if (options.setWidth)  element.style.width = source.offsetWidth + 'px';

     if (options.setHeight) element.style.height = source.offsetHeight + 'px';

     return element;

   }

 };

 

 Object.extend(Element.Methods, {

   getElementsBySelector: Element.Methods.select,

 

   childElements: Element.Methods.immediateDescendants

 });

 

 Element._attributeTranslations = {

   write: {

     names: {

       className: 'class',

       htmlFor:   'for'

     },

     values: { }

   }

 };

 

 if (Prototype.Browser.Opera) {

   Element.Methods.getStyle = Element.Methods.getStyle.wrap(

     function(proceed, element, style) {

       switch (style) {

         case 'left': case 'top': case 'right': case 'bottom':

           if (proceed(element, 'position') === 'static') return null;

         case 'height': case 'width':

           if (!Element.visible(element)) return null;

 

           var dim = parseInt(proceed(element, style), 10);

 

           if (dim !== element['offset' + style.capitalize()])

             return dim + 'px';

 

           var properties;

           if (style === 'height') {

             properties = ['border-top-width', 'padding-top',

              'padding-bottom', 'border-bottom-width'];

           }

           else {

             properties = ['border-left-width', 'padding-left',

              'padding-right', 'border-right-width'];

           }

           return properties.inject(dim, function(memo, property) {

             var val = proceed(element, property);

             return val === null ? memo : memo - parseInt(val, 10);

           }) + 'px';

         default: return proceed(element, style);

       }

     }

   );

 

   Element.Methods.readAttribute = Element.Methods.readAttribute.wrap(

     function(proceed, element, attribute) {

       if (attribute === 'title') return element.title;

       return proceed(element, attribute);

     }

   );

 }

 

 else if (Prototype.Browser.IE) {

   Element.Methods.getOffsetParent = Element.Methods.getOffsetParent.wrap(

     function(proceed, element) {

       element = $(element);

       try { element.offsetParent }

       catch(e) { return $(document.body) }

       var position = element.getStyle('position');

       if (position !== 'static') return proceed(element);

       element.setStyle({ position: 'relative' });

       var value = proceed(element);

       element.setStyle({ position: position });

       return value;

     }

   );

 

   $w('positionedOffset viewportOffset').each(function(method) {

     Element.Methods[method] = Element.Methods[method].wrap(

       function(proceed, element) {

         element = $(element);

         try { element.offsetParent }

         catch(e) { return Element._returnOffset(0,0) }

         var position = element.getStyle('position');

         if (position !== 'static') return proceed(element);

         var offsetParent = element.getOffsetParent();

         if (offsetParent && offsetParent.getStyle('position') === 'fixed')

           offsetParent.setStyle({ zoom: 1 });

         element.setStyle({ position: 'relative' });

         var value = proceed(element);

         element.setStyle({ position: position });

         return value;

       }

     );

   });

 

   Element.Methods.cumulativeOffset = Element.Methods.cumulativeOffset.wrap(

     function(proceed, element) {

       try { element.offsetParent }

       catch(e) { return Element._returnOffset(0,0) }

       return proceed(element);

     }

   );

 

   Element.Methods.getStyle = function(element, style) {

     element = $(element);

     style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();

     var value = element.style[style];

     if (!value && element.currentStyle) value = element.currentStyle[style];

 

     if (style == 'opacity') {

       if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))

         if (value[1]) return parseFloat(value[1]) / 100;

       return 1.0;

     }

 

     if (value == 'auto') {

       if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))

         return element['offset' + style.capitalize()] + 'px';

       return null;

     }

     return value;

   };

 

   Element.Methods.setOpacity = function(element, value) {

     function stripAlpha(filter){

       return filter.replace(/alpha\([^\)]*\)/gi,'');

     }

     element = $(element);

     var currentStyle = element.currentStyle;

     if ((currentStyle && !currentStyle.hasLayout) ||

       (!currentStyle && element.style.zoom == 'normal'))

         element.style.zoom = 1;

 

     var filter = element.getStyle('filter'), style = element.style;

     if (value == 1 || value === '') {

       (filter = stripAlpha(filter)) ?

         style.filter = filter : style.removeAttribute('filter');

       return element;

     } else if (value < 0.00001) value = 0;

     style.filter = stripAlpha(filter) +

       'alpha(opacity=' + (value * 100) + ')';

     return element;

   };

 

   Element._attributeTranslations = (function(){

 

     var classProp = 'className';

     var forProp = 'for';

 

     var el = document.createElement('div');

 

     el.setAttribute(classProp, 'x');

 

     if (el.className !== 'x') {

       el.setAttribute('class', 'x');

       if (el.className === 'x') {

         classProp = 'class';

       }

     }

     el = null;

 

     el = document.createElement('label');

     el.setAttribute(forProp, 'x');

     if (el.htmlFor !== 'x') {

       el.setAttribute('htmlFor', 'x');

       if (el.htmlFor === 'x') {

         forProp = 'htmlFor';

       }

     }

     el = null;

 

     return {

       read: {

         names: {

           'class':      classProp,

           'className':  classProp,

           'for':        forProp,

           'htmlFor':    forProp

         },

         values: {

           _getAttr: function(element, attribute) {

             return element.getAttribute(attribute);

           },

           _getAttr2: function(element, attribute) {

             return element.getAttribute(attribute, 2);

           },

           _getAttrNode: function(element, attribute) {

             var node = element.getAttributeNode(attribute);

             return node ? node.value : "";

           },

           _getEv: (function(){

 

             var el = document.createElement('div');

             el.onclick = Prototype.emptyFunction;

             var value = el.getAttribute('onclick');

             var f;

 

             if (String(value).indexOf('{') > -1) {

               f = function(element, attribute) {

                 attribute = element.getAttribute(attribute);

                 if (!attribute) return null;

                 attribute = attribute.toString();

                 attribute = attribute.split('{')[1];

                 attribute = attribute.split('}')[0];

                 return attribute.strip();

               };

             }

             else if (value === '') {

               f = function(element, attribute) {

                 attribute = element.getAttribute(attribute);

                 if (!attribute) return null;

                 return attribute.strip();

               };

             }

             el = null;

             return f;

           })(),

           _flag: function(element, attribute) {

             return $(element).hasAttribute(attribute) ? attribute : null;

           },

           style: function(element) {

             return element.style.cssText.toLowerCase();

           },

           title: function(element) {

             return element.title;

           }

         }

       }

     }

   })();

 

   Element._attributeTranslations.write = {

     names: Object.extend({

       cellpadding: 'cellPadding',

       cellspacing: 'cellSpacing'

     }, Element._attributeTranslations.read.names),

     values: {

       checked: function(element, value) {

         element.checked = !!value;

       },

 

       style: function(element, value) {

         element.style.cssText = value ? value : '';

       }

     }

   };

 

   Element._attributeTranslations.has = {};

 

   $w('colSpan rowSpan vAlign dateTime accessKey tabIndex ' +

       'encType maxLength readOnly longDesc frameBorder').each(function(attr) {

     Element._attributeTranslations.write.names[attr.toLowerCase()] = attr;

     Element._attributeTranslations.has[attr.toLowerCase()] = attr;

   });

 

   (function(v) {

     Object.extend(v, {

       href:        v._getAttr2,

       src:         v._getAttr2,

       type:        v._getAttr,

       action:      v._getAttrNode,

       disabled:    v._flag,

       checked:     v._flag,

       readonly:    v._flag,

       multiple:    v._flag,

       onload:      v._getEv,

       onunload:    v._getEv,

       onclick:     v._getEv,

       ondblclick:  v._getEv,

       onmousedown: v._getEv,

       onmouseup:   v._getEv,

       onmouseover: v._getEv,

       onmousemove: v._getEv,

       onmouseout:  v._getEv,

       onfocus:     v._getEv,

       onblur:      v._getEv,

       onkeypress:  v._getEv,

       onkeydown:   v._getEv,

       onkeyup:     v._getEv,

       onsubmit:    v._getEv,

       onreset:     v._getEv,

       onselect:    v._getEv,

       onchange:    v._getEv

     });

   })(Element._attributeTranslations.read.values);

 

   if (Prototype.BrowserFeatures.ElementExtensions) {

     (function() {

       function _descendants(element) {

         var nodes = element.getElementsByTagName('*'), results = [];

         for (var i = 0, node; node = nodes[i]; i++)

           if (node.tagName !== "!") // Filter out comment nodes.

             results.push(node);

         return results;

       }

 

       Element.Methods.down = function(element, expression, index) {

         element = $(element);

         if (arguments.length == 1) return element.firstDescendant();

         return Object.isNumber(expression) ? _descendants(element)[expression] :

           Element.select(element, expression)[index || 0];

       }

     })();

   }

 

 }

 

 else if (Prototype.Browser.Gecko && /rv:1\.8\.0/.test(navigator.userAgent)) {

   Element.Methods.setOpacity = function(element, value) {

     element = $(element);

     element.style.opacity = (value == 1) ? 0.999999 :

       (value === '') ? '' : (value < 0.00001) ? 0 : value;

     return element;

   };

 }

 

 else if (Prototype.Browser.WebKit) {

   Element.Methods.setOpacity = function(element, value) {

     element = $(element);

     element.style.opacity = (value == 1 || value === '') ? '' :

       (value < 0.00001) ? 0 : value;

 

     if (value == 1)

       if(element.tagName.toUpperCase() == 'IMG' && element.width) {

         element.width++; element.width--;

       } else try {

         var n = document.createTextNode(' ');

         element.appendChild(n);

         element.removeChild(n);

       } catch (e) { }

 

     return element;

   };

 

   Element.Methods.cumulativeOffset = function(element) {

     var valueT = 0, valueL = 0;

     do {

       valueT += element.offsetTop  || 0;

       valueL += element.offsetLeft || 0;

       if (element.offsetParent == document.body)

         if (Element.getStyle(element, 'position') == 'absolute') break;

 

       element = element.offsetParent;

     } while (element);

 

     return Element._returnOffset(valueL, valueT);

   };

 }

 

 if ('outerHTML' in document.documentElement) {

   Element.Methods.replace = function(element, content) {

     element = $(element);

 

     if (content && content.toElement) content = content.toElement();

     if (Object.isElement(content)) {

       element.parentNode.replaceChild(content, element);

       return element;

     }

 

     content = Object.toHTML(content);

     var parent = element.parentNode, tagName = parent.tagName.toUpperCase();

 

     if (Element._insertionTranslations.tags[tagName]) {

       var nextSibling = element.next();

       var fragments = Element._getContentFromAnonymousElement(tagName, content.stripScripts());

       parent.removeChild(element);

       if (nextSibling)

         fragments.each(function(node) { parent.insertBefore(node, nextSibling) });

       else

         fragments.each(function(node) { parent.appendChild(node) });

     }

     else element.outerHTML = content.stripScripts();

 

     content.evalScripts.bind(content).defer();

     return element;

   };

 }

 

 Element._returnOffset = function(l, t) {

   var result = [l, t];

   result.left = l;

   result.top = t;

   return result;

 };

 

 Element._getContentFromAnonymousElement = function(tagName, html) {

   var div = new Element('div'), t = Element._insertionTranslations.tags[tagName];

   if (t) {

     div.innerHTML = t[0] + html + t[1];

     t[2].times(function() { div = div.firstChild });

   } else div.innerHTML = html;

   return $A(div.childNodes);

 };

 

 Element._insertionTranslations = {

   before: function(element, node) {

     element.parentNode.insertBefore(node, element);

   },

   top: function(element, node) {

     element.insertBefore(node, element.firstChild);

   },

   bottom: function(element, node) {

     element.appendChild(node);

   },

   after: function(element, node) {

     element.parentNode.insertBefore(node, element.nextSibling);

   },

   tags: {

     TABLE:  ['<table>',                '</table>',                   1],

     TBODY:  ['<table><tbody>',         '</tbody></table>',           2],

     TR:     ['<table><tbody><tr>',     '</tr></tbody></table>',      3],

     TD:     ['<table><tbody><tr><td>', '</td></tr></tbody></table>', 4],

     SELECT: ['<select>',               '</select>',                  1]

   }

 };

 

 (function() {

   var tags = Element._insertionTranslations.tags;

   Object.extend(tags, {

     THEAD: tags.TBODY,

     TFOOT: tags.TBODY,

     TH:    tags.TD

   });

 })();

 

 Element.Methods.Simulated = {

   hasAttribute: function(element, attribute) {

     attribute = Element._attributeTranslations.has[attribute] || attribute;

     var node = $(element).getAttributeNode(attribute);

     return !!(node && node.specified);

   }

 };

 

 Element.Methods.ByTag = { };

 

 Object.extend(Element, Element.Methods);

 

 (function(div) {

 

   if (!Prototype.BrowserFeatures.ElementExtensions && div['__proto__']) {

     window.HTMLElement = { };

     window.HTMLElement.prototype = div['__proto__'];

     Prototype.BrowserFeatures.ElementExtensions = true;

   }

 

   div = null;

 

 })(document.createElement('div'))

 

 Element.extend = (function() {

 

   function checkDeficiency(tagName) {

     if (typeof window.Element != 'undefined') {

       var proto = window.Element.prototype;

       if (proto) {

         var id = '_' + (Math.random()+'').slice(2);

         var el = document.createElement(tagName);

         proto[id] = 'x';

         var isBuggy = (el[id] !== 'x');

         delete proto[id];

         el = null;

         return isBuggy;

       }

     }

     return false;

   }

 

   function extendElementWith(element, methods) {

     for (var property in methods) {

       var value = methods[property];

       if (Object.isFunction(value) && !(property in element))

         element[property] = value.methodize();

     }

   }

 

   var HTMLOBJECTELEMENT_PROTOTYPE_BUGGY = checkDeficiency('object');

 

   if (Prototype.BrowserFeatures.SpecificElementExtensions) {

     if (HTMLOBJECTELEMENT_PROTOTYPE_BUGGY) {

       return function(element) {

         if (element && typeof element._extendedByPrototype == 'undefined') {

           var t = element.tagName;

           if (t && (/^(?:object|applet|embed)$/i.test(t))) {

             extendElementWith(element, Element.Methods);

             extendElementWith(element, Element.Methods.Simulated);

             extendElementWith(element, Element.Methods.ByTag[t.toUpperCase()]);

           }

         }

         return element;

       }

     }

     return Prototype.K;

   }

 

   var Methods = { }, ByTag = Element.Methods.ByTag;

 

   var extend = Object.extend(function(element) {

     if (!element || typeof element._extendedByPrototype != 'undefined' ||

         element.nodeType != 1 || element == window) return element;

 

     var methods = Object.clone(Methods),

         tagName = element.tagName.toUpperCase();

 

     if (ByTag[tagName]) Object.extend(methods, ByTag[tagName]);

 

     extendElementWith(element, methods);

 

     element._extendedByPrototype = Prototype.emptyFunction;

     return element;

 

   }, {

     refresh: function() {

       if (!Prototype.BrowserFeatures.ElementExtensions) {

         Object.extend(Methods, Element.Methods);

         Object.extend(Methods, Element.Methods.Simulated);

       }

     }

   });

 

   extend.refresh();

   return extend;

 })();

 

 Element.hasAttribute = function(element, attribute) {

   if (element.hasAttribute) return element.hasAttribute(attribute);

   return Element.Methods.Simulated.hasAttribute(element, attribute);

 };

 

 Element.addMethods = function(methods) {

   var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;

 

   if (!methods) {

     Object.extend(Form, Form.Methods);

     Object.extend(Form.Element, Form.Element.Methods);

     Object.extend(Element.Methods.ByTag, {

       "FORM":     Object.clone(Form.Methods),

       "INPUT":    Object.clone(Form.Element.Methods),

       "SELECT":   Object.clone(Form.Element.Methods),

       "TEXTAREA": Object.clone(Form.Element.Methods)

     });

   }

 

   if (arguments.length == 2) {

     var tagName = methods;

     methods = arguments[1];

   }

 

   if (!tagName) Object.extend(Element.Methods, methods || { });

   else {

     if (Object.isArray(tagName)) tagName.each(extend);

     else extend(tagName);

   }

 

   function extend(tagName) {

     tagName = tagName.toUpperCase();

     if (!Element.Methods.ByTag[tagName])

       Element.Methods.ByTag[tagName] = { };

     Object.extend(Element.Methods.ByTag[tagName], methods);

   }

 

   function copy(methods, destination, onlyIfAbsent) {

     onlyIfAbsent = onlyIfAbsent || false;

     for (var property in methods) {

       var value = methods[property];

       if (!Object.isFunction(value)) continue;

       if (!onlyIfAbsent || !(property in destination))

         destination[property] = value.methodize();

     }

   }

 

   function findDOMClass(tagName) {

     var klass;

     var trans = {

       "OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",

       "FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",

       "DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",

       "H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",

       "INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":

       "TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":

       "TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":

       "TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":

       "FrameSet", "IFRAME": "IFrame"

     };

     if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';

     if (window[klass]) return window[klass];

     klass = 'HTML' + tagName + 'Element';

     if (window[klass]) return window[klass];

     klass = 'HTML' + tagName.capitalize() + 'Element';

     if (window[klass]) return window[klass];

 

     var element = document.createElement(tagName);

     var proto = element['__proto__'] || element.constructor.prototype;

     element = null;

     return proto;

   }

 

   var elementPrototype = window.HTMLElement ? HTMLElement.prototype :

    Element.prototype;

 

   if (F.ElementExtensions) {

     copy(Element.Methods, elementPrototype);

     copy(Element.Methods.Simulated, elementPrototype, true);

   }

 

   if (F.SpecificElementExtensions) {

     for (var tag in Element.Methods.ByTag) {

       var klass = findDOMClass(tag);

       if (Object.isUndefined(klass)) continue;

       copy(T[tag], klass.prototype);

     }

   }

 

   Object.extend(Element, Element.Methods);

   delete Element.ByTag;

 

   if (Element.extend.refresh) Element.extend.refresh();

   Element.cache = { };

 };

 

 

 document.viewport = {

 

   getDimensions: function() {

     return { width: this.getWidth(), height: this.getHeight() };

   },

 

   getScrollOffsets: function() {

     return Element._returnOffset(

       window.pageXOffset || document.documentElement.scrollLeft || document.body.scrollLeft,

       window.pageYOffset || document.documentElement.scrollTop  || document.body.scrollTop);

   }

 };

 

 (function(viewport) {

   var B = Prototype.Browser, doc = document, element, property = {};

 

   function getRootElement() {

     if (B.WebKit && !doc.evaluate)

       return document;

 

     if (B.Opera && window.parseFloat(window.opera.version()) < 9.5)

       return document.body;

 

     return document.documentElement;

   }

 

   function define(D) {

     if (!element) element = getRootElement();

 

     property[D] = 'client' + D;

 

     viewport['get' + D] = function() { return element[property[D]] };

     return viewport['get' + D]();

   }

 

   viewport.getWidth  = define.curry('Width');

 

   viewport.getHeight = define.curry('Height');

 })(document.viewport);

 

 

 Element.Storage = {

   UID: 1

 };

 

 Element.addMethods({

   getStorage: function(element) {

     if (!(element = $(element))) return;

 

     var uid;

     if (element === window) {

       uid = 0;

     } else {

       if (typeof element._prototypeUID === "undefined")

         element._prototypeUID = [Element.Storage.UID++];

       uid = element._prototypeUID[0];

     }

 

     if (!Element.Storage[uid])

       Element.Storage[uid] = $H();

 

     return Element.Storage[uid];

   },

 

   store: function(element, key, value) {

     if (!(element = $(element))) return;

 

     if (arguments.length === 2) {

       Element.getStorage(element).update(key);

     } else {

       Element.getStorage(element).set(key, value);

     }

 

     return element;

   },

 

   retrieve: function(element, key, defaultValue) {

     if (!(element = $(element))) return;

     var hash = Element.getStorage(element), value = hash.get(key);

 

     if (Object.isUndefined(value)) {

       hash.set(key, defaultValue);

       value = defaultValue;

     }

 

     return value;

   },

 

   clone: function(element, deep) {

     if (!(element = $(element))) return;

     var clone = element.cloneNode(deep);

     clone._prototypeUID = void 0;

     if (deep) {

       var descendants = Element.select(clone, '*'),

           i = descendants.length;

       while (i--) {

         descendants[i]._prototypeUID = void 0;

       }

     }

     return Element.extend(clone);

   }

 });

 /* Portions of the Selector class are derived from Jack Slocum's DomQuery,

  * part of YUI-Ext version 0.40, distributed under the terms of an MIT-style

  * license.  Please see http://www.yui-ext.com/ for more information. */

 

 var Selector = Class.create({

   initialize: function(expression) {

     this.expression = expression.strip();

 

     if (this.shouldUseSelectorsAPI()) {

       this.mode = 'selectorsAPI';

     } else if (this.shouldUseXPath()) {

       this.mode = 'xpath';

       this.compileXPathMatcher();

     } else {

       this.mode = "normal";

       this.compileMatcher();

     }

 

   },

 

   shouldUseXPath: (function() {

 

     var IS_DESCENDANT_SELECTOR_BUGGY = (function(){

       var isBuggy = false;

       if (document.evaluate && window.XPathResult) {

         var el = document.createElement('div');

         el.innerHTML = '<ul><li></li></ul><div><ul><li></li></ul></div>';

 

         var xpath = ".//*[local-name()='ul' or local-name()='UL']" +

           "//*[local-name()='li' or local-name()='LI']";

 

         var result = document.evaluate(xpath, el, null,

           XPathResult.ORDERED_NODE_SNAPSHOT_TYPE, null);

 

         isBuggy = (result.snapshotLength !== 2);

         el = null;

       }

       return isBuggy;

     })();

 

     return function() {

       if (!Prototype.BrowserFeatures.XPath) return false;

 

       var e = this.expression;

 

       if (Prototype.Browser.WebKit &&

        (e.include("-of-type") || e.include(":empty")))

         return false;

 

       if ((/(\[[\w-]*?:|:checked)/).test(e))

         return false;

 

       if (IS_DESCENDANT_SELECTOR_BUGGY) return false;

 

       return true;

     }

 

   })(),

 

   shouldUseSelectorsAPI: function() {

     if (!Prototype.BrowserFeatures.SelectorsAPI) return false;

 

     if (Selector.CASE_INSENSITIVE_CLASS_NAMES) return false;

 

     if (!Selector._div) Selector._div = new Element('div');

 

     try {

       Selector._div.querySelector(this.expression);

     } catch(e) {

       return false;

     }

 

     return true;

   },

 

   compileMatcher: function() {

     var e = this.expression, ps = Selector.patterns, h = Selector.handlers,

         c = Selector.criteria, le, p, m, len = ps.length, name;

 

     if (Selector._cache[e]) {

       this.matcher = Selector._cache[e];

       return;

     }

 

     this.matcher = ["this.matcher = function(root) {",

                     "var r = root, h = Selector.handlers, c = false, n;"];

 

     while (e && le != e && (/\S/).test(e)) {

       le = e;

       for (var i = 0; i<len; i++) {

         p = ps[i].re;

         name = ps[i].name;

         if (m = e.match(p)) {

           this.matcher.push(Object.isFunction(c[name]) ? c[name](m) :

             new Template(c[name]).evaluate(m));

           e = e.replace(m[0], '');

           break;

         }

       }

     }

 

     this.matcher.push("return h.unique(n);\n}");

     eval(this.matcher.join('\n'));

     Selector._cache[this.expression] = this.matcher;

   },

 

   compileXPathMatcher: function() {

     var e = this.expression, ps = Selector.patterns,

         x = Selector.xpath, le, m, len = ps.length, name;

 

     if (Selector._cache[e]) {

       this.xpath = Selector._cache[e]; return;

     }

 

     this.matcher = ['.//*'];

     while (e && le != e && (/\S/).test(e)) {

       le = e;

       for (var i = 0; i<len; i++) {

         name = ps[i].name;

         if (m = e.match(ps[i].re)) {

           this.matcher.push(Object.isFunction(x[name]) ? x[name](m) :

             new Template(x[name]).evaluate(m));

           e = e.replace(m[0], '');

           break;

         }

       }

     }

 

     this.xpath = this.matcher.join('');

     Selector._cache[this.expression] = this.xpath;

   },

 

   findElements: function(root) {

     root = root || document;

     var e = this.expression, results;

 

     switch (this.mode) {

       case 'selectorsAPI':

         if (root !== document) {

           var oldId = root.id, id = $(root).identify();

           id = id.replace(/([\.:])/g, "\\$1");

           e = "#" + id + " " + e;

         }

 

         results = $A(root.querySelectorAll(e)).map(Element.extend);

         root.id = oldId;

 

         return results;

       case 'xpath':

         return document._getElementsByXPath(this.xpath, root);

       default:

        return this.matcher(root);

     }

   },

 

   match: function(element) {

     this.tokens = [];

 

     var e = this.expression, ps = Selector.patterns, as = Selector.assertions;

     var le, p, m, len = ps.length, name;

 

     while (e && le !== e && (/\S/).test(e)) {

       le = e;

       for (var i = 0; i<len; i++) {

         p = ps[i].re;

         name = ps[i].name;

         if (m = e.match(p)) {

           if (as[name]) {

             this.tokens.push([name, Object.clone(m)]);

             e = e.replace(m[0], '');

           } else {

             return this.findElements(document).include(element);

           }

         }

       }

     }

 

     var match = true, name, matches;

     for (var i = 0, token; token = this.tokens[i]; i++) {

       name = token[0], matches = token[1];

       if (!Selector.assertions[name](element, matches)) {

         match = false; break;

       }

     }

 

     return match;

   },

 

   toString: function() {

     return this.expression;

   },

 

   inspect: function() {

     return "#<Selector:" + this.expression.inspect() + ">";

   }

 });

 

 if (Prototype.BrowserFeatures.SelectorsAPI &&

  document.compatMode === 'BackCompat') {

   Selector.CASE_INSENSITIVE_CLASS_NAMES = (function(){

     var div = document.createElement('div'),

      span = document.createElement('span');

 

     div.id = "prototype_test_id";

     span.className = 'Test';

     div.appendChild(span);

     var isIgnored = (div.querySelector('#prototype_test_id .test') !== null);

     div = span = null;

     return isIgnored;

   })();

 }

 

 Object.extend(Selector, {

   _cache: { },

 

   xpath: {

     descendant:   "//*",

     child:        "/*",

     adjacent:     "/following-sibling::*[1]",

     laterSibling: '/following-sibling::*',

     tagName:      function(m) {

       if (m[1] == '*') return '';

       return "[local-name()='" + m[1].toLowerCase() +

              "' or local-name()='" + m[1].toUpperCase() + "']";

     },

     className:    "[contains(concat(' ', @class, ' '), ' #{1} ')]",

     id:           "[@id='#{1}']",

     attrPresence: function(m) {

       m[1] = m[1].toLowerCase();

       return new Template("[@#{1}]").evaluate(m);

     },

     attr: function(m) {

       m[1] = m[1].toLowerCase();

       m[3] = m[5] || m[6];

       return new Template(Selector.xpath.operators[m[2]]).evaluate(m);

     },

     pseudo: function(m) {

       var h = Selector.xpath.pseudos[m[1]];

       if (!h) return '';

       if (Object.isFunction(h)) return h(m);

       return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);

     },

     operators: {

       '=':  "[@#{1}='#{3}']",

       '!=': "[@#{1}!='#{3}']",

       '^=': "[starts-with(@#{1}, '#{3}')]",

       '$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",

       '*=': "[contains(@#{1}, '#{3}')]",

       '~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",

       '|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"

     },

     pseudos: {

       'first-child': '[not(preceding-sibling::*)]',

       'last-child':  '[not(following-sibling::*)]',

       'only-child':  '[not(preceding-sibling::* or following-sibling::*)]',

       'empty':       "[count(*) = 0 and (count(text()) = 0)]",

       'checked':     "[@checked]",

       'disabled':    "[(@disabled) and (@type!='hidden')]",

       'enabled':     "[not(@disabled) and (@type!='hidden')]",

       'not': function(m) {

         var e = m[6], p = Selector.patterns,

             x = Selector.xpath, le, v, len = p.length, name;

 

         var exclusion = [];

         while (e && le != e && (/\S/).test(e)) {

           le = e;

           for (var i = 0; i<len; i++) {

             name = p[i].name

             if (m = e.match(p[i].re)) {

               v = Object.isFunction(x[name]) ? x[name](m) : new Template(x[name]).evaluate(m);

               exclusion.push("(" + v.substring(1, v.length - 1) + ")");

               e = e.replace(m[0], '');

               break;

             }

           }

         }

         return "[not(" + exclusion.join(" and ") + ")]";

       },

       'nth-child':      function(m) {

         return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);

       },

       'nth-last-child': function(m) {

         return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);

       },

       'nth-of-type':    function(m) {

         return Selector.xpath.pseudos.nth("position() ", m);

       },

       'nth-last-of-type': function(m) {

         return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);

       },

       'first-of-type':  function(m) {

         m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);

       },

       'last-of-type':   function(m) {

         m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);

       },

       'only-of-type':   function(m) {

         var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);

       },

       nth: function(fragment, m) {

         var mm, formula = m[6], predicate;

         if (formula == 'even') formula = '2n+0';

         if (formula == 'odd')  formula = '2n+1';

         if (mm = formula.match(/^(\d+)$/)) // digit only

           return '[' + fragment + "= " + mm[1] + ']';

         if (mm = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b

           if (mm[1] == "-") mm[1] = -1;

           var a = mm[1] ? Number(mm[1]) : 1;

           var b = mm[2] ? Number(mm[2]) : 0;

           predicate = "[((#{fragment} - #{b}) mod #{a} = 0) and " +

           "((#{fragment} - #{b}) div #{a} >= 0)]";

           return new Template(predicate).evaluate({

             fragment: fragment, a: a, b: b });

         }

       }

     }

   },

 

   criteria: {

     tagName:      'n = h.tagName(n, r, "#{1}", c);      c = false;',

     className:    'n = h.className(n, r, "#{1}", c);    c = false;',

     id:           'n = h.id(n, r, "#{1}", c);           c = false;',

     attrPresence: 'n = h.attrPresence(n, r, "#{1}", c); c = false;',

     attr: function(m) {

       m[3] = (m[5] || m[6]);

       return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}", c); c = false;').evaluate(m);

     },

     pseudo: function(m) {

       if (m[6]) m[6] = m[6].replace(/"/g, '\\"');

       return new Template('n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;').evaluate(m);

     },

     descendant:   'c = "descendant";',

     child:        'c = "child";',

     adjacent:     'c = "adjacent";',

     laterSibling: 'c = "laterSibling";'

   },

 

   patterns: [

     { name: 'laterSibling', re: /^\s*~\s*/ },

     { name: 'child',        re: /^\s*>\s*/ },

     { name: 'adjacent',     re: /^\s*\+\s*/ },

     { name: 'descendant',   re: /^\s/ },

 

     { name: 'tagName',      re: /^\s*(\*|[\w\-]+)(\b|$)?/ },

     { name: 'id',           re: /^#([\w\-\*]+)(\b|$)/ },

     { name: 'className',    re: /^\.([\w\-\*]+)(\b|$)/ },

     { name: 'pseudo',       re: /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$|(?=\s|[:+~>]))/ },

     { name: 'attrPresence', re: /^\[((?:[\w-]+:)?[\w-]+)\]/ },

     { name: 'attr',         re: /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\4]*?)\4|([^'"][^\]]*?)))?\]/ }

   ],

 

   assertions: {

     tagName: function(element, matches) {

       return matches[1].toUpperCase() == element.tagName.toUpperCase();

     },

 

     className: function(element, matches) {

       return Element.hasClassName(element, matches[1]);

     },

 

     id: function(element, matches) {

       return element.id === matches[1];

     },

 

     attrPresence: function(element, matches) {

       return Element.hasAttribute(element, matches[1]);

     },

 

     attr: function(element, matches) {

       var nodeValue = Element.readAttribute(element, matches[1]);

       return nodeValue && Selector.operators[matches[2]](nodeValue, matches[5] || matches[6]);

     }

   },

 

   handlers: {

     concat: function(a, b) {

       for (var i = 0, node; node = b[i]; i++)

         a.push(node);

       return a;

     },

 

     mark: function(nodes) {

       var _true = Prototype.emptyFunction;

       for (var i = 0, node; node = nodes[i]; i++)

         node._countedByPrototype = _true;

       return nodes;

     },

 

     unmark: (function(){

 

       var PROPERTIES_ATTRIBUTES_MAP = (function(){

         var el = document.createElement('div'),

             isBuggy = false,

             propName = '_countedByPrototype',

             value = 'x'

         el[propName] = value;

         isBuggy = (el.getAttribute(propName) === value);

         el = null;

         return isBuggy;

       })();

 

       return PROPERTIES_ATTRIBUTES_MAP ?

         function(nodes) {

           for (var i = 0, node; node = nodes[i]; i++)

             node.removeAttribute('_countedByPrototype');

           return nodes;

         } :

         function(nodes) {

           for (var i = 0, node; node = nodes[i]; i++)

             node._countedByPrototype = void 0;

           return nodes;

         }

     })(),

 

     index: function(parentNode, reverse, ofType) {

       parentNode._countedByPrototype = Prototype.emptyFunction;

       if (reverse) {

         for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {

           var node = nodes[i];

           if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;

         }

       } else {

         for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)

           if (node.nodeType == 1 && (!ofType || node._countedByPrototype)) node.nodeIndex = j++;

       }

     },

 

     unique: function(nodes) {

       if (nodes.length == 0) return nodes;

       var results = [], n;

       for (var i = 0, l = nodes.length; i < l; i++)

         if (typeof (n = nodes[i])._countedByPrototype == 'undefined') {

           n._countedByPrototype = Prototype.emptyFunction;

           results.push(Element.extend(n));

         }

       return Selector.handlers.unmark(results);

     },

 

     descendant: function(nodes) {

       var h = Selector.handlers;

       for (var i = 0, results = [], node; node = nodes[i]; i++)

         h.concat(results, node.getElementsByTagName('*'));

       return results;

     },

 

     child: function(nodes) {

       var h = Selector.handlers;

       for (var i = 0, results = [], node; node = nodes[i]; i++) {

         for (var j = 0, child; child = node.childNodes[j]; j++)

           if (child.nodeType == 1 && child.tagName != '!') results.push(child);

       }

       return results;

     },

 

     adjacent: function(nodes) {

       for (var i = 0, results = [], node; node = nodes[i]; i++) {

         var next = this.nextElementSibling(node);

         if (next) results.push(next);

       }

       return results;

     },

 

     laterSibling: function(nodes) {

       var h = Selector.handlers;

       for (var i = 0, results = [], node; node = nodes[i]; i++)

         h.concat(results, Element.nextSiblings(node));

       return results;

     },

 

     nextElementSibling: function(node) {

       while (node = node.nextSibling)

         if (node.nodeType == 1) return node;

       return null;

     },

 

     previousElementSibling: function(node) {

       while (node = node.previousSibling)

         if (node.nodeType == 1) return node;

       return null;

     },

 

     tagName: function(nodes, root, tagName, combinator) {

       var uTagName = tagName.toUpperCase();

       var results = [], h = Selector.handlers;

       if (nodes) {

         if (combinator) {

           if (combinator == "descendant") {

             for (var i = 0, node; node = nodes[i]; i++)

               h.concat(results, node.getElementsByTagName(tagName));

             return results;

           } else nodes = this[combinator](nodes);

           if (tagName == "*") return nodes;

         }

         for (var i = 0, node; node = nodes[i]; i++)

           if (node.tagName.toUpperCase() === uTagName) results.push(node);

         return results;

       } else return root.getElementsByTagName(tagName);

     },

 

     id: function(nodes, root, id, combinator) {

       var targetNode = $(id), h = Selector.handlers;

 

       if (root == document) {

         if (!targetNode) return [];

         if (!nodes) return [targetNode];

       } else {

         if (!root.sourceIndex || root.sourceIndex < 1) {

           var nodes = root.getElementsByTagName('*');

           for (var j = 0, node; node = nodes[j]; j++) {

             if (node.id === id) return [node];

           }

         }

       }

 

       if (nodes) {

         if (combinator) {

           if (combinator == 'child') {

             for (var i = 0, node; node = nodes[i]; i++)

               if (targetNode.parentNode == node) return [targetNode];

           } else if (combinator == 'descendant') {

             for (var i = 0, node; node = nodes[i]; i++)

               if (Element.descendantOf(targetNode, node)) return [targetNode];

           } else if (combinator == 'adjacent') {

             for (var i = 0, node; node = nodes[i]; i++)

               if (Selector.handlers.previousElementSibling(targetNode) == node)

                 return [targetNode];

           } else nodes = h[combinator](nodes);

         }

         for (var i = 0, node; node = nodes[i]; i++)

           if (node == targetNode) return [targetNode];

         return [];

       }

       return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];

     },

 

     className: function(nodes, root, className, combinator) {

       if (nodes && combinator) nodes = this[combinator](nodes);

       return Selector.handlers.byClassName(nodes, root, className);

     },

 

     byClassName: function(nodes, root, className) {

       if (!nodes) nodes = Selector.handlers.descendant([root]);

       var needle = ' ' + className + ' ';

       for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {

         nodeClassName = node.className;

         if (nodeClassName.length == 0) continue;

         if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))

           results.push(node);

       }

       return results;

     },

 

     attrPresence: function(nodes, root, attr, combinator) {

       if (!nodes) nodes = root.getElementsByTagName("*");

       if (nodes && combinator) nodes = this[combinator](nodes);

       var results = [];

       for (var i = 0, node; node = nodes[i]; i++)

         if (Element.hasAttribute(node, attr)) results.push(node);

       return results;

     },

 

     attr: function(nodes, root, attr, value, operator, combinator) {

       if (!nodes) nodes = root.getElementsByTagName("*");

       if (nodes && combinator) nodes = this[combinator](nodes);

       var handler = Selector.operators[operator], results = [];

       for (var i = 0, node; node = nodes[i]; i++) {

         var nodeValue = Element.readAttribute(node, attr);

         if (nodeValue === null) continue;

         if (handler(nodeValue, value)) results.push(node);

       }

       return results;

     },

 

     pseudo: function(nodes, name, value, root, combinator) {

       if (nodes && combinator) nodes = this[combinator](nodes);

       if (!nodes) nodes = root.getElementsByTagName("*");

       return Selector.pseudos[name](nodes, value, root);

     }

   },

 

   pseudos: {

     'first-child': function(nodes, value, root) {

       for (var i = 0, results = [], node; node = nodes[i]; i++) {

         if (Selector.handlers.previousElementSibling(node)) continue;

           results.push(node);

       }

       return results;

     },

     'last-child': function(nodes, value, root) {

       for (var i = 0, results = [], node; node = nodes[i]; i++) {

         if (Selector.handlers.nextElementSibling(node)) continue;

           results.push(node);

       }

       return results;

     },

     'only-child': function(nodes, value, root) {

       var h = Selector.handlers;

       for (var i = 0, results = [], node; node = nodes[i]; i++)

         if (!h.previousElementSibling(node) && !h.nextElementSibling(node))

           results.push(node);

       return results;

     },

     'nth-child':        function(nodes, formula, root) {

       return Selector.pseudos.nth(nodes, formula, root);

     },

     'nth-last-child':   function(nodes, formula, root) {

       return Selector.pseudos.nth(nodes, formula, root, true);

     },

     'nth-of-type':      function(nodes, formula, root) {

       return Selector.pseudos.nth(nodes, formula, root, false, true);

     },

     'nth-last-of-type': function(nodes, formula, root) {

       return Selector.pseudos.nth(nodes, formula, root, true, true);

     },

     'first-of-type':    function(nodes, formula, root) {

       return Selector.pseudos.nth(nodes, "1", root, false, true);

     },

     'last-of-type':     function(nodes, formula, root) {

       return Selector.pseudos.nth(nodes, "1", root, true, true);

     },

     'only-of-type':     function(nodes, formula, root) {

       var p = Selector.pseudos;

       return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);

     },

 

     getIndices: function(a, b, total) {

       if (a == 0) return b > 0 ? [b] : [];

       return $R(1, total).inject([], function(memo, i) {

         if (0 == (i - b) % a && (i - b) / a >= 0) memo.push(i);

         return memo;

       });

     },

 

     nth: function(nodes, formula, root, reverse, ofType) {

       if (nodes.length == 0) return [];

       if (formula == 'even') formula = '2n+0';

       if (formula == 'odd')  formula = '2n+1';

       var h = Selector.handlers, results = [], indexed = [], m;

       h.mark(nodes);

       for (var i = 0, node; node = nodes[i]; i++) {

         if (!node.parentNode._countedByPrototype) {

           h.index(node.parentNode, reverse, ofType);

           indexed.push(node.parentNode);

         }

       }

       if (formula.match(/^\d+$/)) { // just a number

         formula = Number(formula);

         for (var i = 0, node; node = nodes[i]; i++)

           if (node.nodeIndex == formula) results.push(node);

       } else if (m = formula.match(/^(-?\d*)?n(([+-])(\d+))?/)) { // an+b

         if (m[1] == "-") m[1] = -1;

         var a = m[1] ? Number(m[1]) : 1;

         var b = m[2] ? Number(m[2]) : 0;

         var indices = Selector.pseudos.getIndices(a, b, nodes.length);

         for (var i = 0, node, l = indices.length; node = nodes[i]; i++) {

           for (var j = 0; j < l; j++)

             if (node.nodeIndex == indices[j]) results.push(node);

         }

       }

       h.unmark(nodes);

       h.unmark(indexed);

       return results;

     },

 

     'empty': function(nodes, value, root) {

       for (var i = 0, results = [], node; node = nodes[i]; i++) {

         if (node.tagName == '!' || node.firstChild) continue;

         results.push(node);

       }

       return results;

     },

 

     'not': function(nodes, selector, root) {

       var h = Selector.handlers, selectorType, m;

       var exclusions = new Selector(selector).findElements(root);

       h.mark(exclusions);

       for (var i = 0, results = [], node; node = nodes[i]; i++)

         if (!node._countedByPrototype) results.push(node);

       h.unmark(exclusions);

       return results;

     },

 

     'enabled': function(nodes, value, root) {

       for (var i = 0, results = [], node; node = nodes[i]; i++)

         if (!node.disabled && (!node.type || node.type !== 'hidden'))

           results.push(node);

       return results;

     },

 

     'disabled': function(nodes, value, root) {

       for (var i = 0, results = [], node; node = nodes[i]; i++)

         if (node.disabled) results.push(node);

       return results;

     },

 

     'checked': function(nodes, value, root) {

       for (var i = 0, results = [], node; node = nodes[i]; i++)

         if (node.checked) results.push(node);

       return results;

     }

   },

 

   operators: {

     '=':  function(nv, v) { return nv == v; },

     '!=': function(nv, v) { return nv != v; },

     '^=': function(nv, v) { return nv == v || nv && nv.startsWith(v); },

     '$=': function(nv, v) { return nv == v || nv && nv.endsWith(v); },

     '*=': function(nv, v) { return nv == v || nv && nv.include(v); },

     '~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },

     '|=': function(nv, v) { return ('-' + (nv || "").toUpperCase() +

      '-').include('-' + (v || "").toUpperCase() + '-'); }

   },

 

   split: function(expression) {

     var expressions = [];

     expression.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {

       expressions.push(m[1].strip());

     });

     return expressions;

   },

 

   matchElements: function(elements, expression) {

     var matches = $$(expression), h = Selector.handlers;

     h.mark(matches);

     for (var i = 0, results = [], element; element = elements[i]; i++)

       if (element._countedByPrototype) results.push(element);

     h.unmark(matches);

     return results;

   },

 

   findElement: function(elements, expression, index) {

     if (Object.isNumber(expression)) {

       index = expression; expression = false;

     }

     return Selector.matchElements(elements, expression || '*')[index || 0];

   },

 

   findChildElements: function(element, expressions) {

     expressions = Selector.split(expressions.join(','));

     var results = [], h = Selector.handlers;

     for (var i = 0, l = expressions.length, selector; i < l; i++) {

       selector = new Selector(expressions[i].strip());

       h.concat(results, selector.findElements(element));

     }

     return (l > 1) ? h.unique(results) : results;

   }

 });

 

 if (Prototype.Browser.IE) {

   Object.extend(Selector.handlers, {

     concat: function(a, b) {

       for (var i = 0, node; node = b[i]; i++)

         if (node.tagName !== "!") a.push(node);

       return a;

     }

   });

 }

 

 function $$() {

   return Selector.findChildElements(document, $A(arguments));

 }

 

 var Form = {

   reset: function(form) {

     form = $(form);

     form.reset();

     return form;

   },

 

   serializeElements: function(elements, options) {

     if (typeof options != 'object') options = { hash: !!options };

     else if (Object.isUndefined(options.hash)) options.hash = true;

     var key, value, submitted = false, submit = options.submit;

 

     var data = elements.inject({ }, function(result, element) {

       if (!element.disabled && element.name) {

         key = element.name; value = $(element).getValue();

         if (value != null && element.type != 'file' && (element.type != 'submit' || (!submitted &&

             submit !== false && (!submit || key == submit) && (submitted = true)))) {

           if (key in result) {

             if (!Object.isArray(result[key])) result[key] = [result[key]];

             result[key].push(value);

           }

           else result[key] = value;

         }

       }

       return result;

     });

 

     return options.hash ? data : Object.toQueryString(data);

   }

 };

 

 Form.Methods = {

   serialize: function(form, options) {

     return Form.serializeElements(Form.getElements(form), options);

   },

 

   getElements: function(form) {

     var elements = $(form).getElementsByTagName('*'),

         element,

         arr = [ ],

         serializers = Form.Element.Serializers;

     for (var i = 0; element = elements[i]; i++) {

       arr.push(element);

     }

     return arr.inject([], function(elements, child) {

       if (serializers[child.tagName.toLowerCase()])

         elements.push(Element.extend(child));

       return elements;

     })

   },

 

   getInputs: function(form, typeName, name) {

     form = $(form);

     var inputs = form.getElementsByTagName('input');

 

     if (!typeName && !name) return $A(inputs).map(Element.extend);

 

     for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {

       var input = inputs[i];

       if ((typeName && input.type != typeName) || (name && input.name != name))

         continue;

       matchingInputs.push(Element.extend(input));

     }

 

     return matchingInputs;

   },

 

   disable: function(form) {

     form = $(form);

     Form.getElements(form).invoke('disable');

     return form;

   },

 

   enable: function(form) {

     form = $(form);

     Form.getElements(form).invoke('enable');

     return form;

   },

 

   findFirstElement: function(form) {

     var elements = $(form).getElements().findAll(function(element) {

       return 'hidden' != element.type && !element.disabled;

     });

     var firstByIndex = elements.findAll(function(element) {

       return element.hasAttribute('tabIndex') && element.tabIndex >= 0;

     }).sortBy(function(element) { return element.tabIndex }).first();

 

     return firstByIndex ? firstByIndex : elements.find(function(element) {

       return /^(?:input|select|textarea)$/i.test(element.tagName);

     });

   },

 

   focusFirstElement: function(form) {

     form = $(form);

     form.findFirstElement().activate();

     return form;

   },

 

   request: function(form, options) {

     form = $(form), options = Object.clone(options || { });

 

     var params = options.parameters, action = form.readAttribute('action') || '';

     if (action.blank()) action = window.location.href;

     options.parameters = form.serialize(true);

 

     if (params) {

       if (Object.isString(params)) params = params.toQueryParams();

       Object.extend(options.parameters, params);

     }

 

     if (form.hasAttribute('method') && !options.method)

       options.method = form.method;

 

     return new Ajax.Request(action, options);

   }

 };

 

 /*--------------------------------------------------------------------------*/

 

 

 Form.Element = {

   focus: function(element) {

     $(element).focus();

     return element;

   },

 

   select: function(element) {

     $(element).select();

     return element;

   }

 };

 

 Form.Element.Methods = {

 

   serialize: function(element) {

     element = $(element);

     if (!element.disabled && element.name) {

       var value = element.getValue();

       if (value != undefined) {

         var pair = { };

         pair[element.name] = value;

         return Object.toQueryString(pair);

       }

     }

     return '';

   },

 

   getValue: function(element) {

     element = $(element);

     var method = element.tagName.toLowerCase();

     return Form.Element.Serializers[method](element);

   },

 

   setValue: function(element, value) {

     element = $(element);

     var method = element.tagName.toLowerCase();

     Form.Element.Serializers[method](element, value);

     return element;

   },

 

   clear: function(element) {

     $(element).value = '';

     return element;

   },

 

   present: function(element) {

     return $(element).value != '';

   },

 

   activate: function(element) {

     element = $(element);

     try {

       element.focus();

       if (element.select && (element.tagName.toLowerCase() != 'input' ||

           !(/^(?:button|reset|submit)$/i.test(element.type))))

         element.select();

     } catch (e) { }

     return element;

   },

 

   disable: function(element) {

     element = $(element);

     element.disabled = true;

     return element;

   },

 

   enable: function(element) {

     element = $(element);

     element.disabled = false;

     return element;

   }

 };

 

 /*--------------------------------------------------------------------------*/

 

 var Field = Form.Element;

 

 var $F = Form.Element.Methods.getValue;

 

 /*--------------------------------------------------------------------------*/

 

 Form.Element.Serializers = {

   input: function(element, value) {

     switch (element.type.toLowerCase()) {

       case 'checkbox':

       case 'radio':

         return Form.Element.Serializers.inputSelector(element, value);

       default:

         return Form.Element.Serializers.textarea(element, value);

     }

   },

 

   inputSelector: function(element, value) {

     if (Object.isUndefined(value)) return element.checked ? element.value : null;

     else element.checked = !!value;

   },

 

   textarea: function(element, value) {

     if (Object.isUndefined(value)) return element.value;

     else element.value = value;

   },

 

   select: function(element, value) {

     if (Object.isUndefined(value))

       return this[element.type == 'select-one' ?

         'selectOne' : 'selectMany'](element);

     else {

       var opt, currentValue, single = !Object.isArray(value);

       for (var i = 0, length = element.length; i < length; i++) {

         opt = element.options[i];

         currentValue = this.optionValue(opt);

         if (single) {

           if (currentValue == value) {

             opt.selected = true;

             return;

           }

         }

         else opt.selected = value.include(currentValue);

       }

     }

   },

 

   selectOne: function(element) {

     var index = element.selectedIndex;

     return index >= 0 ? this.optionValue(element.options[index]) : null;

   },

 

   selectMany: function(element) {

     var values, length = element.length;

     if (!length) return null;

 

     for (var i = 0, values = []; i < length; i++) {

       var opt = element.options[i];

       if (opt.selected) values.push(this.optionValue(opt));

     }

     return values;

   },

 

   optionValue: function(opt) {

     return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;

   }

 };

 

 /*--------------------------------------------------------------------------*/

 

 

 Abstract.TimedObserver = Class.create(PeriodicalExecuter, {

   initialize: function($super, element, frequency, callback) {

     $super(callback, frequency);

     this.element   = $(element);

     this.lastValue = this.getValue();

   },

 

   execute: function() {

     var value = this.getValue();

     if (Object.isString(this.lastValue) && Object.isString(value) ?

         this.lastValue != value : String(this.lastValue) != String(value)) {

       this.callback(this.element, value);

       this.lastValue = value;

     }

   }

 });

 

 Form.Element.Observer = Class.create(Abstract.TimedObserver, {

   getValue: function() {

     return Form.Element.getValue(this.element);

   }

 });

 

 Form.Observer = Class.create(Abstract.TimedObserver, {

   getValue: function() {

     return Form.serialize(this.element);

   }

 });

 

 /*--------------------------------------------------------------------------*/

 

 Abstract.EventObserver = Class.create({

   initialize: function(element, callback) {

     this.element  = $(element);

     this.callback = callback;

 

     this.lastValue = this.getValue();

     if (this.element.tagName.toLowerCase() == 'form')

       this.registerFormCallbacks();

     else

       this.registerCallback(this.element);

   },

 

   onElementEvent: function() {

     var value = this.getValue();

     if (this.lastValue != value) {

       this.callback(this.element, value);

       this.lastValue = value;

     }

   },

 

   registerFormCallbacks: function() {

     Form.getElements(this.element).each(this.registerCallback, this);

   },

 

   registerCallback: function(element) {

     if (element.type) {

       switch (element.type.toLowerCase()) {

         case 'checkbox':

         case 'radio':

           Event.observe(element, 'click', this.onElementEvent.bind(this));

           break;

         default:

           Event.observe(element, 'change', this.onElementEvent.bind(this));

           break;

       }

     }

   }

 });

 

 Form.Element.EventObserver = Class.create(Abstract.EventObserver, {

   getValue: function() {

     return Form.Element.getValue(this.element);

   }

 });

 

 Form.EventObserver = Class.create(Abstract.EventObserver, {

   getValue: function() {

     return Form.serialize(this.element);

   }

 });

 (function() {

 

   var Event = {

     KEY_BACKSPACE: 8,

     KEY_TAB:       9,

     KEY_RETURN:   13,

     KEY_ESC:      27,

     KEY_LEFT:     37,

     KEY_UP:       38,

     KEY_RIGHT:    39,

     KEY_DOWN:     40,

     KEY_DELETE:   46,

     KEY_HOME:     36,

     KEY_END:      35,

     KEY_PAGEUP:   33,

     KEY_PAGEDOWN: 34,

     KEY_INSERT:   45,

 

     cache: {}

   };

 

   var docEl = document.documentElement;

   var MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED = 'onmouseenter' in docEl

     && 'onmouseleave' in docEl;

 

   var _isButton;

   if (Prototype.Browser.IE) {

     var buttonMap = { 0: 1, 1: 4, 2: 2 };

     _isButton = function(event, code) {

       return event.button === buttonMap[code];

     };

   } else if (Prototype.Browser.WebKit) {

     _isButton = function(event, code) {

       switch (code) {

         case 0: return event.which == 1 && !event.metaKey;

         case 1: return event.which == 1 && event.metaKey;

         default: return false;

       }

     };

   } else {

     _isButton = function(event, code) {

       return event.which ? (event.which === code + 1) : (event.button === code);

     };

   }

 

   function isLeftClick(event)   { return _isButton(event, 0) }

 

   function isMiddleClick(event) { return _isButton(event, 1) }

 

   function isRightClick(event)  { return _isButton(event, 2) }

 

   function element(event) {

     event = Event.extend(event);

 

     var node = event.target, type = event.type,

      currentTarget = event.currentTarget;

 

     if (currentTarget && currentTarget.tagName) {

       if (type === 'load' || type === 'error' ||

         (type === 'click' && currentTarget.tagName.toLowerCase() === 'input'

           && currentTarget.type === 'radio'))

             node = currentTarget;

     }

 

     if (node.nodeType == Node.TEXT_NODE)

       node = node.parentNode;

 

     return Element.extend(node);

   }

 

   function findElement(event, expression) {

     var element = Event.element(event);

     if (!expression) return element;

     var elements = [element].concat(element.ancestors());

     return Selector.findElement(elements, expression, 0);

   }

 

   function pointer(event) {

     return { x: pointerX(event), y: pointerY(event) };

   }

 

   function pointerX(event) {

     var docElement = document.documentElement,

      body = document.body || { scrollLeft: 0 };

 

     return event.pageX || (event.clientX +

       (docElement.scrollLeft || body.scrollLeft) -

       (docElement.clientLeft || 0));

   }

 

   function pointerY(event) {

     var docElement = document.documentElement,

      body = document.body || { scrollTop: 0 };

 

     return  event.pageY || (event.clientY +

        (docElement.scrollTop || body.scrollTop) -

        (docElement.clientTop || 0));

   }

 

 

   function stop(event) {

     Event.extend(event);

     event.preventDefault();

     event.stopPropagation();

 

     event.stopped = true;

   }

 

   Event.Methods = {

     isLeftClick: isLeftClick,

     isMiddleClick: isMiddleClick,

     isRightClick: isRightClick,

 

     element: element,

     findElement: findElement,

 

     pointer: pointer,

     pointerX: pointerX,

     pointerY: pointerY,

 

     stop: stop

   };

 

 

   var methods = Object.keys(Event.Methods).inject({ }, function(m, name) {

     m[name] = Event.Methods[name].methodize();

     return m;

   });

 

   if (Prototype.Browser.IE) {

     function _relatedTarget(event) {

       var element;

       switch (event.type) {

         case 'mouseover': element = event.fromElement; break;

         case 'mouseout':  element = event.toElement;   break;

         default: return null;

       }

       return Element.extend(element);

     }

 

     Object.extend(methods, {

       stopPropagation: function() { this.cancelBubble = true },

       preventDefault:  function() { this.returnValue = false },

       inspect: function() { return '[object Event]' }

     });

 

     Event.extend = function(event, element) {

       if (!event) return false;

       if (event._extendedByPrototype) return event;

 

       event._extendedByPrototype = Prototype.emptyFunction;

       var pointer = Event.pointer(event);

 

       Object.extend(event, {

         target: event.srcElement || element,

         relatedTarget: _relatedTarget(event),

         pageX:  pointer.x,

         pageY:  pointer.y

       });

 

       return Object.extend(event, methods);

     };

   } else {

     Event.prototype = window.Event.prototype || document.createEvent('HTMLEvents').__proto__;

     Object.extend(Event.prototype, methods);

     Event.extend = Prototype.K;

   }

 

   function _createResponder(element, eventName, handler) {

     var registry = Element.retrieve(element, 'prototype_event_registry');

 

     if (Object.isUndefined(registry)) {

       CACHE.push(element);

       registry = Element.retrieve(element, 'prototype_event_registry', $H());

     }

 

     var respondersForEvent = registry.get(eventName);

     if (Object.isUndefined(respondersForEvent)) {

       respondersForEvent = [];

       registry.set(eventName, respondersForEvent);

     }

 

     if (respondersForEvent.pluck('handler').include(handler)) return false;

 

     var responder;

     if (eventName.include(":")) {

       responder = function(event) {

         if (Object.isUndefined(event.eventName))

           return false;

 

         if (event.eventName !== eventName)

           return false;

 

         Event.extend(event, element);

         handler.call(element, event);

       };

     } else {

       if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED &&

        (eventName === "mouseenter" || eventName === "mouseleave")) {

         if (eventName === "mouseenter" || eventName === "mouseleave") {

           responder = function(event) {

             Event.extend(event, element);

 

             var parent = event.relatedTarget;

             while (parent && parent !== element) {

               try { parent = parent.parentNode; }

               catch(e) { parent = element; }

             }

 

             if (parent === element) return;

 

             handler.call(element, event);

           };

         }

       } else {

         responder = function(event) {

           Event.extend(event, element);

           handler.call(element, event);

         };

       }

     }

 

     responder.handler = handler;

     respondersForEvent.push(responder);

     return responder;

   }

 

   function _destroyCache() {

     for (var i = 0, length = CACHE.length; i < length; i++) {

       Event.stopObserving(CACHE[i]);

       CACHE[i] = null;

     }

   }

 

   var CACHE = [];

 

   if (Prototype.Browser.IE)

     window.attachEvent('onunload', _destroyCache);

 

   if (Prototype.Browser.WebKit)

     window.addEventListener('unload', Prototype.emptyFunction, false);

 

 

   var _getDOMEventName = Prototype.K;

 

   if (!MOUSEENTER_MOUSELEAVE_EVENTS_SUPPORTED) {

     _getDOMEventName = function(eventName) {

       var translations = { mouseenter: "mouseover", mouseleave: "mouseout" };

       return eventName in translations ? translations[eventName] : eventName;

     };

   }

 

   function observe(element, eventName, handler) {

     element = $(element);

 

     var responder = _createResponder(element, eventName, handler);

 

     if (!responder) return element;

 

     if (eventName.include(':')) {

       if (element.addEventListener)

         element.addEventListener("dataavailable", responder, false);

       else {

         element.attachEvent("ondataavailable", responder);

         element.attachEvent("onfilterchange", responder);

       }

     } else {

       var actualEventName = _getDOMEventName(eventName);

 

       if (element.addEventListener)

         element.addEventListener(actualEventName, responder, false);

       else

         element.attachEvent("on" + actualEventName, responder);

     }

 

     return element;

   }

 

   function stopObserving(element, eventName, handler) {

     element = $(element);

 

     var registry = Element.retrieve(element, 'prototype_event_registry');

 

     if (Object.isUndefined(registry)) return element;

 

     if (eventName && !handler) {

       var responders = registry.get(eventName);

 

       if (Object.isUndefined(responders)) return element;

 

       responders.each( function(r) {

         Element.stopObserving(element, eventName, r.handler);

       });

       return element;

     } else if (!eventName) {

       registry.each( function(pair) {

         var eventName = pair.key, responders = pair.value;

 

         responders.each( function(r) {

           Element.stopObserving(element, eventName, r.handler);

         });

       });

       return element;

     }

 

     var responders = registry.get(eventName);

 

     if (!responders) return;

 

     var responder = responders.find( function(r) { return r.handler === handler; });

     if (!responder) return element;

 

     var actualEventName = _getDOMEventName(eventName);

 

     if (eventName.include(':')) {

       if (element.removeEventListener)

         element.removeEventListener("dataavailable", responder, false);

       else {

         element.detachEvent("ondataavailable", responder);

         element.detachEvent("onfilterchange",  responder);

       }

     } else {

       if (element.removeEventListener)

         element.removeEventListener(actualEventName, responder, false);

       else

         element.detachEvent('on' + actualEventName, responder);

     }

 

     registry.set(eventName, responders.without(responder));

 

     return element;

   }

 

   function fire(element, eventName, memo, bubble) {

     element = $(element);

 

     if (Object.isUndefined(bubble))

       bubble = true;

 

     if (element == document && document.createEvent && !element.dispatchEvent)

       element = document.documentElement;

 

     var event;

     if (document.createEvent) {

       event = document.createEvent('HTMLEvents');

       event.initEvent('dataavailable', true, true);

     } else {

       event = document.createEventObject();

       event.eventType = bubble ? 'ondataavailable' : 'onfilterchange';

     }

 

     event.eventName = eventName;

     event.memo = memo || { };

 

     if (document.createEvent)

       element.dispatchEvent(event);

     else

       element.fireEvent(event.eventType, event);

 

     return Event.extend(event);

   }

 

 

   Object.extend(Event, Event.Methods);

 

   Object.extend(Event, {

     fire:          fire,

     observe:       observe,

     stopObserving: stopObserving

   });

 

   Element.addMethods({

     fire:          fire,

 

     observe:       observe,

 

     stopObserving: stopObserving

   });

 

   Object.extend(document, {

     fire:          fire.methodize(),

 

     observe:       observe.methodize(),

 

     stopObserving: stopObserving.methodize(),

 

     loaded:        false

   });

 

   if (window.Event) Object.extend(window.Event, Event);

   else window.Event = Event;

 })();

 

 (function() {

   /* Support for the DOMContentLoaded event is based on work by Dan Webb,

      Matthias Miller, Dean Edwards, John Resig, and Diego Perini. */

 

   var timer;

 

   function fireContentLoadedEvent() {

     if (document.loaded) return;

     if (timer) window.clearTimeout(timer);

     document.loaded = true;

     document.fire('dom:loaded');

   }

 

   function checkReadyState() {

     if (document.readyState === 'complete') {

       document.stopObserving('readystatechange', checkReadyState);

       fireContentLoadedEvent();

     }

   }

 

   function pollDoScroll() {

     try { document.documentElement.doScroll('left'); }

     catch(e) {

       timer = pollDoScroll.defer();

       return;

     }

     fireContentLoadedEvent();

   }

 

   if (document.addEventListener) {

     document.addEventListener('DOMContentLoaded', fireContentLoadedEvent, false);

   } else {

     document.observe('readystatechange', checkReadyState);

     if (window == top)

       timer = pollDoScroll.defer();

   }

 

   Event.observe(window, 'load', fireContentLoadedEvent);

 })();

 

 Element.addMethods();

 

 /*------------------------------- DEPRECATED -------------------------------*/

 

 Hash.toQueryString = Object.toQueryString;

 

 var Toggle = { display: Element.toggle };

 

 Element.Methods.childOf = Element.Methods.descendantOf;

 

 var Insertion = {

   Before: function(element, content) {

     return Element.insert(element, {before:content});

   },

 

   Top: function(element, content) {

     return Element.insert(element, {top:content});

   },

 

   Bottom: function(element, content) {

     return Element.insert(element, {bottom:content});

   },

 

   After: function(element, content) {

     return Element.insert(element, {after:content});

   }

 };

 

 var $continue = new Error('"throw $continue" is deprecated, use "return" instead');

 

 var Position = {

   includeScrollOffsets: false,

 

   prepare: function() {

     this.deltaX =  window.pageXOffset

                 || document.documentElement.scrollLeft

                 || document.body.scrollLeft

                 || 0;

     this.deltaY =  window.pageYOffset

                 || document.documentElement.scrollTop

                 || document.body.scrollTop

                 || 0;

   },

 

   within: function(element, x, y) {

     if (this.includeScrollOffsets)

       return this.withinIncludingScrolloffsets(element, x, y);

     this.xcomp = x;

     this.ycomp = y;

     this.offset = Element.cumulativeOffset(element);

 

     return (y >= this.offset[1] &&

             y <  this.offset[1] + element.offsetHeight &&

             x >= this.offset[0] &&

             x <  this.offset[0] + element.offsetWidth);

   },

 

   withinIncludingScrolloffsets: function(element, x, y) {

     var offsetcache = Element.cumulativeScrollOffset(element);

 

     this.xcomp = x + offsetcache[0] - this.deltaX;

     this.ycomp = y + offsetcache[1] - this.deltaY;

     this.offset = Element.cumulativeOffset(element);

 

     return (this.ycomp >= this.offset[1] &&

             this.ycomp <  this.offset[1] + element.offsetHeight &&

             this.xcomp >= this.offset[0] &&

             this.xcomp <  this.offset[0] + element.offsetWidth);

   },

 

   overlap: function(mode, element) {

     if (!mode) return 0;

     if (mode == 'vertical')

       return ((this.offset[1] + element.offsetHeight) - this.ycomp) /

         element.offsetHeight;

     if (mode == 'horizontal')

       return ((this.offset[0] + element.offsetWidth) - this.xcomp) /

         element.offsetWidth;

   },

 

 

   cumulativeOffset: Element.Methods.cumulativeOffset,

 

   positionedOffset: Element.Methods.positionedOffset,

 

   absolutize: function(element) {

     Position.prepare();

     return Element.absolutize(element);

   },

 

   relativize: function(element) {

     Position.prepare();

     return Element.relativize(element);

   },

 

   realOffset: Element.Methods.cumulativeScrollOffset,

 

   offsetParent: Element.Methods.getOffsetParent,

 

   page: Element.Methods.viewportOffset,

 

   clone: function(source, target, options) {

     options = options || { };

     return Element.clonePosition(target, source, options);

   }

 };

 

 /*--------------------------------------------------------------------------*/

 

 if (!document.getElementsByClassName) document.getElementsByClassName = function(instanceMethods){

   function iter(name) {

     return name.blank() ? null : "[contains(concat(' ', @class, ' '), ' " + name + " ')]";

   }

 

   instanceMethods.getElementsByClassName = Prototype.BrowserFeatures.XPath ?

   function(element, className) {

     className = className.toString().strip();

     var cond = /\s/.test(className) ? $w(className).map(iter).join('') : iter(className);

     return cond ? document._getElementsByXPath('.//*' + cond, element) : [];

   } : function(element, className) {

     className = className.toString().strip();

     var elements = [], classNames = (/\s/.test(className) ? $w(className) : null);

     if (!classNames && !className) return elements;

 

     var nodes = $(element).getElementsByTagName('*');

     className = ' ' + className + ' ';

 

     for (var i = 0, child, cn; child = nodes[i]; i++) {

       if (child.className && (cn = ' ' + child.className + ' ') && (cn.include(className) ||

           (classNames && classNames.all(function(name) {

             return !name.toString().blank() && cn.include(' ' + name + ' ');

           }))))

         elements.push(Element.extend(child));

     }

     return elements;

   };

 

   return function(className, parentElement) {

     return $(parentElement || document.body).getElementsByClassName(className);

   };

 }(Element.Methods);

 

 /*--------------------------------------------------------------------------*/

 

 Element.ClassNames = Class.create();

 Element.ClassNames.prototype = {

   initialize: function(element) {

     this.element = $(element);

   },

 

   _each: function(iterator) {

     this.element.className.split(/\s+/).select(function(name) {

       return name.length > 0;

     })._each(iterator);

   },

 

   set: function(className) {

     this.element.className = className;

   },

 

   add: function(classNameToAdd) {

     if (this.include(classNameToAdd)) return;

     this.set($A(this).concat(classNameToAdd).join(' '));

   },

 

   remove: function(classNameToRemove) {

     if (!this.include(classNameToRemove)) return;

     this.set($A(this).without(classNameToRemove).join(' '));

   },

 

   toString: function() {

     return $A(this).join(' ');

   }

 };

 

 Object.extend(Element.ClassNames.prototype, Enumerable);

 

 /*--------------------------------------------------------------------------*/