/*  Prototype JavaScript framework, version 1.4.0

  *  (c) 2005 Sam Stephenson <sam@conio.net>

  *

  *  THIS FILE IS AUTOMATICALLY GENERATED. When sending patches, please diff

  *  against the source tree, available from the Prototype darcs repository.

  *

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

  *

  *  For details, see the Prototype web site: http://prototype.conio.net/

  *

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

 

 var Prototype = {

   Version: '1.4.0',

   ScriptFragment: '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)',

 

   emptyFunction: function() {},

   K: function(x) {return x}

 }

 

 var Class = {

   create: function() {

     return function() {

       this.initialize.apply(this, arguments);

     }

   }

 }

 

 var Abstract = new Object();

 

 Object.extend = function(destination, source) {

   for (property in source) {

     destination[property] = source[property];

   }

   return destination;

 }

 

 Object.inspect = function(object) {

   try {

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

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

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

   } catch (e) {

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

     throw e;

   }

 }

 

 Function.prototype.bind = function() {

   var __method = this, args = $A(arguments), object = args.shift();

   return function() {

     return __method.apply(object, args.concat($A(arguments)));

   }

 }

 

 Function.prototype.bindAsEventListener = function(object) {

   var __method = this;

   return function(event) {

     return __method.call(object, event || window.event);

   }

 }

 

 Object.extend(Number.prototype, {

   toColorPart: function() {

     var digits = this.toString(16);

     if (this < 16) return '0' + digits;

     return digits;

   },

 

   succ: function() {

     return this + 1;

   },

 

   times: function(iterator) {

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

     return this;

   }

 });

 

 var Try = {

   these: function() {

     var returnValue;

 

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

       var lambda = arguments[i];

       try {

         returnValue = lambda();

         break;

       } catch (e) {}

     }

 

     return returnValue;

   }

 }

 

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

 

 var PeriodicalExecuter = Class.create();

 PeriodicalExecuter.prototype = {

   initialize: function(callback, frequency) {

     this.callback = callback;

     this.frequency = frequency;

     this.currentlyExecuting = false;

 

     this.registerCallback();

   },

 

   registerCallback: function() {

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

   },

 

   onTimerEvent: function() {

     if (!this.currentlyExecuting) {

       try {

         this.currentlyExecuting = true;

         this.callback();

       } finally {

         this.currentlyExecuting = false;

       }

     }

   }

 }

 

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

 

 function $() {

   var elements = new Array();

 

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

     var element = arguments[i];

     if (typeof element == 'string')

       element = document.getElementById(element);

 

     if (arguments.length == 1)

       return element;

 

     elements.push(element);

   }

 

   return elements;

 }

 Object.extend(String.prototype, {

   stripTags: function() {

     return this.replace(/<\/?[^>]+>/gi, '');

   },

 

   stripScripts: function() {

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

   },

 

   extractScripts: function() {

     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];

     });

   },

 

   evalScripts: function() {

     return this.extractScripts().map(eval);

   },

 

   escapeHTML: function() {

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

     var text = document.createTextNode(this);

     div.appendChild(text);

     return div.innerHTML;

   },

 

   unescapeHTML: function() {

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

     div.innerHTML = this.stripTags();

     return div.childNodes[0] ? div.childNodes[0].nodeValue : '';

   },

 

   toQueryParams: function() {

     var pairs = this.match(/^\??(.*)$/)[1].split('&');

     return pairs.inject({}, function(params, pairString) {

       var pair = pairString.split('=');

       params[pair[0]] = pair[1];

       return params;

     });

   },

 

   toArray: function() {

     return this.split('');

   },

 

   camelize: function() {

     var oStringList = this.split('-');

     if (oStringList.length == 1) return oStringList[0];

 

     var camelizedString = this.indexOf('-') == 0

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

       : oStringList[0];

 

     for (var i = 1, len = oStringList.length; i < len; i++) {

       var s = oStringList[i];

       camelizedString += s.charAt(0).toUpperCase() + s.substring(1);

     }

 

     return camelizedString;

   },

 

   inspect: function() {

     return "'" + this.replace('\\', '\\\\').replace("'", '\\\'') + "'";

   }

 });

 

 String.prototype.parseQuery = String.prototype.toQueryParams;

 

 var $break    = new Object();

 var $continue = new Object();

 

 var Enumerable = {

   each: function(iterator) {

     var index = 0;

     try {

       this._each(function(value) {

         try {

           iterator(value, index++);

         } catch (e) {

           if (e != $continue) throw e;

         }

       });

     } catch (e) {

       if (e != $break) throw e;

     }

   },

 

   all: function(iterator) {

     var result = true;

     this.each(function(value, index) {

       result = result && !!(iterator || Prototype.K)(value, index);

       if (!result) throw $break;

     });

     return result;

   },

 

   any: function(iterator) {

     var result = true;

     this.each(function(value, index) {

       if (result = !!(iterator || Prototype.K)(value, index))

         throw $break;

     });

     return result;

   },

 

   collect: function(iterator) {

     var results = [];

     this.each(function(value, index) {

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

     });

     return results;

   },

 

   detect: function (iterator) {

     var result;

     this.each(function(value, index) {

       if (iterator(value, index)) {

         result = value;

         throw $break;

       }

     });

     return result;

   },

 

   findAll: function(iterator) {

     var results = [];

     this.each(function(value, index) {

       if (iterator(value, index))

         results.push(value);

     });

     return results;

   },

 

   grep: function(pattern, iterator) {

     var results = [];

     this.each(function(value, index) {

       var stringValue = value.toString();

       if (stringValue.match(pattern))

         results.push((iterator || Prototype.K)(value, index));

     })

     return results;

   },

 

   include: function(object) {

     var found = false;

     this.each(function(value) {

       if (value == object) {

         found = true;

         throw $break;

       }

     });

     return found;

   },

 

   inject: function(memo, iterator) {

     this.each(function(value, index) {

       memo = iterator(memo, value, index);

     });

     return memo;

   },

 

   invoke: function(method) {

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

     return this.collect(function(value) {

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

     });

   },

 

   max: function(iterator) {

     var result;

     this.each(function(value, index) {

       value = (iterator || Prototype.K)(value, index);

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

         result = value;

     });

     return result;

   },

 

   min: function(iterator) {

     var result;

     this.each(function(value, index) {

       value = (iterator || Prototype.K)(value, index);

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

         result = value;

     });

     return result;

   },

 

   partition: function(iterator) {

     var trues = [], falses = [];

     this.each(function(value, index) {

       ((iterator || Prototype.K)(value, index) ?

         trues : falses).push(value);

     });

     return [trues, falses];

   },

 

   pluck: function(property) {

     var results = [];

     this.each(function(value, index) {

       results.push(value[property]);

     });

     return results;

   },

 

   reject: function(iterator) {

     var results = [];

     this.each(function(value, index) {

       if (!iterator(value, index))

         results.push(value);

     });

     return results;

   },

 

   sortBy: function(iterator) {

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

       return {value: value, criteria: iterator(value, index)};

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

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

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

     }).pluck('value');

   },

 

   toArray: function() {

     return this.collect(Prototype.K);

   },

 

   zip: function() {

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

     if (typeof args.last() == 'function')

       iterator = args.pop();

 

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

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

       iterator(value = collections.pluck(index));

       return value;

     });

   },

 

   inspect: function() {

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

   }

 }

 

 Object.extend(Enumerable, {

   map:     Enumerable.collect,

   find:    Enumerable.detect,

   select:  Enumerable.findAll,

   member:  Enumerable.include,

   entries: Enumerable.toArray

 });

 var $A = Array.from = function(iterable) {

   if (!iterable) return [];

   if (iterable.toArray) {

     return iterable.toArray();

   } else {

     var results = [];

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

       results.push(iterable[i]);

     return results;

   }

 }

 

 Object.extend(Array.prototype, Enumerable);

 

 Array.prototype._reverse = Array.prototype.reverse;

 

 Object.extend(Array.prototype, {

   _each: function(iterator) {

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

       iterator(this[i]);

   },

 

   clear: function() {

     this.length = 0;

     return this;

   },

 

   first: function() {

     return this[0];

   },

 

   last: function() {

     return this[this.length - 1];

   },

 

   compact: function() {

     return this.select(function(value) {

       return value != undefined || value != null;

     });

   },

 

   flatten: function() {

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

       return array.concat(value.constructor == Array ?

         value.flatten() : [value]);

     });

   },

 

   without: function() {

     var values = $A(arguments);

     return this.select(function(value) {

       return !values.include(value);

     });

   },

 

   indexOf: function(object) {

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

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

     return -1;

   },

 

   reverse: function(inline) {

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

   },

 

   shift: function() {

     var result = this[0];

     for (var i = 0; i < this.length - 1; i++)

       this[i] = this[i + 1];

     this.length--;

     return result;

   },

 

   inspect: function() {

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

   }

 });

 var Hash = {

   _each: function(iterator) {

     for (key in this) {

       var value = this[key];

       if (typeof value == 'function') continue;

 

       var pair = [key, value];

       pair.key = key;

       pair.value = value;

       iterator(pair);

     }

   },

 

   keys: function() {

     return this.pluck('key');

   },

 

   values: function() {

     return this.pluck('value');

   },

 

   merge: function(hash) {

     return $H(hash).inject($H(this), function(mergedHash, pair) {

       mergedHash[pair.key] = pair.value;

       return mergedHash;

     });

   },

 

   toQueryString: function() {

     return this.map(function(pair) {

       return pair.map(encodeURIComponent).join('=');

     }).join('&');

   },

 

   inspect: function() {

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

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

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

   }

 }

 

 function $H(object) {

   var hash = Object.extend({}, object || {});

   Object.extend(hash, Enumerable);

   Object.extend(hash, Hash);

   return hash;

 }

 ObjectRange = Class.create();

 Object.extend(ObjectRange.prototype, Enumerable);

 Object.extend(ObjectRange.prototype, {

   initialize: function(start, end, exclusive) {

     this.start = start;

     this.end = end;

     this.exclusive = exclusive;

   },

 

   _each: function(iterator) {

     var value = this.start;

     do {

       iterator(value);

       value = value.succ();

     } while (this.include(value));

   },

 

   include: function(value) {

     if (value < this.start)

       return false;

     if (this.exclusive)

       return value < this.end;

     return value <= this.end;

   }

 });

 

 var $R = function(start, end, exclusive) {

   return new ObjectRange(start, end, exclusive);

 }

 

 var Ajax = {

   getTransport: function() {

     return Try.these(

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

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

       function() {return new XMLHttpRequest()}

     ) || false;

   },

 

   activeRequestCount: 0

 }

 

 Ajax.Responders = {

   responders: [],

 

   _each: function(iterator) {

     this.responders._each(iterator);

   },

 

   register: function(responderToAdd) {

     if (!this.include(responderToAdd))

       this.responders.push(responderToAdd);

   },

 

   unregister: function(responderToRemove) {

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

   },

 

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

     this.each(function(responder) {

       if (responder[callback] && typeof responder[callback] == 'function') {

         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 = function() {};

 Ajax.Base.prototype = {

   setOptions: function(options) {

     this.options = {

       method:       'post',

       asynchronous: true,

       parameters:   ''

     }

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

   },

 

   responseIsSuccess: function() {

     return this.transport.status == undefined

         || this.transport.status == 0

         || (this.transport.status >= 200 && this.transport.status < 300);

   },

 

   responseIsFailure: function() {

     return !this.responseIsSuccess();

   }

 }

 

 Ajax.Request = Class.create();

 Ajax.Request.Events =

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

 

 Ajax.Request.prototype = Object.extend(new Ajax.Base(), {

   initialize: function(url, options) {

     this.transport = Ajax.getTransport();

     this.setOptions(options);

     this.request(url);

   },

 

   request: function(url) {

     var parameters = this.options.parameters || '';

     if (parameters.length > 0) parameters += '&_=';

 

     try {

       this.url = url;

       if (this.options.method == 'get' && parameters.length > 0)

         this.url += (this.url.match(/\?/) ? '&' : '?') + parameters;

 

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

 

       this.transport.open(this.options.method, this.url,

         this.options.asynchronous);

 

       if (this.options.asynchronous) {

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

         setTimeout((function() {this.respondToReadyState(1)}).bind(this), 10);

       }

 

       this.setRequestHeaders();

 

       var body = this.options.postBody ? this.options.postBody : parameters;

       this.transport.send(this.options.method == 'post' ? body : null);

 

     } catch (e) {

       this.dispatchException(e);

     }

   },

 

   setRequestHeaders: function() {

     var requestHeaders =

       ['X-Requested-With', 'XMLHttpRequest',

        'X-Prototype-Version', Prototype.Version];

 

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

       requestHeaders.push('Content-type',

         'application/x-www-form-urlencoded');

 

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

        * a bug where XMLHttpReqeuest sends an incorrect Content-length

        * header. See Mozilla Bugzilla #246651.

        */

       if (this.transport.overrideMimeType)

         requestHeaders.push('Connection', 'close');

     }

 

     if (this.options.requestHeaders)

       requestHeaders.push.apply(requestHeaders, this.options.requestHeaders);

 

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

       this.transport.setRequestHeader(requestHeaders[i], requestHeaders[i+1]);

   },

 

   onStateChange: function() {

     var readyState = this.transport.readyState;

     if (readyState != 1)

       this.respondToReadyState(this.transport.readyState);

   },

 

   header: function(name) {

     try {

       return this.transport.getResponseHeader(name);

     } catch (e) {}

   },

 

   evalJSON: function() {

     try {

       return eval(this.header('X-JSON'));

     } catch (e) {}

   },

 

   evalResponse: function() {

     try {

       return eval(this.transport.responseText);

     } catch (e) {

       this.dispatchException(e);

     }

   },

 

   respondToReadyState: function(readyState) {

     var event = Ajax.Request.Events[readyState];

     var transport = this.transport, json = this.evalJSON();

 

     if (event == 'Complete') {

       try {

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

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

          || Prototype.emptyFunction)(transport, json);

       } catch (e) {

         this.dispatchException(e);

       }

 

       if ((this.header('Content-type') || '').match(/^text\/javascript/i))

         this.evalResponse();

     }

 

     try {

       (this.options['on' + event] || Prototype.emptyFunction)(transport, json);

       Ajax.Responders.dispatch('on' + event, this, transport, json);

     } catch (e) {

       this.dispatchException(e);

     }

 

     /* Avoid memory leak in MSIE: clean up the oncomplete event handler */

     if (event == 'Complete')

       this.transport.onreadystatechange = Prototype.emptyFunction;

   },

 

   dispatchException: function(exception) {

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

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

   }

 });

 

 Ajax.Updater = Class.create();

 

 Object.extend(Object.extend(Ajax.Updater.prototype, Ajax.Request.prototype), {

   initialize: function(container, url, options) {

     this.containers = {

       success: container.success ? $(container.success) : $(container),

       failure: container.failure ? $(container.failure) :

         (container.success ? null : $(container))

     }

 

     this.transport = Ajax.getTransport();

     this.setOptions(options);

 

     var onComplete = this.options.onComplete || Prototype.emptyFunction;

     this.options.onComplete = (function(transport, object) {

       this.updateContent();

       onComplete(transport, object);

     }).bind(this);

 

     this.request(url);

   },

 

   updateContent: function() {

     var receiver = this.responseIsSuccess() ?

       this.containers.success : this.containers.failure;

     var response = this.transport.responseText;

 

     if (!this.options.evalScripts)

       response = response.stripScripts();

 

     if (receiver) {

       if (this.options.insertion) {

         new this.options.insertion(receiver, response);

       } else {

         Element.update(receiver, response);

       }

     }

 

     if (this.responseIsSuccess()) {

       if (this.onComplete)

         setTimeout(this.onComplete.bind(this), 10);

     }

   }

 });

 

 Ajax.PeriodicalUpdater = Class.create();

 Ajax.PeriodicalUpdater.prototype = Object.extend(new Ajax.Base(), {

   initialize: function(container, url, options) {

     this.setOptions(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.onComplete = undefined;

     clearTimeout(this.timer);

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

   },

 

   updateComplete: function(request) {

     if (this.options.decay) {

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

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

 

       this.lastText = request.responseText;

     }

     this.timer = setTimeout(this.onTimerEvent.bind(this),

       this.decay * this.frequency * 1000);

   },

 

   onTimerEvent: function() {

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

   }

 });

 document.getElementsByClassName = function(className, parentElement) {

   var children = ($(parentElement) || document.body).getElementsByTagName('*');

   return $A(children).inject([], function(elements, child) {

     if (child.className.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))

       elements.push(child);

     return elements;

   });

 }

 

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

 

 if (!window.Element) {

   var Element = new Object();

 }

 

 Object.extend(Element, {

   visible: function(element) {

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

   },

 

   toggle: function() {

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

       var element = $(arguments[i]);

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

     }

   },

 

   hide: function() {

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

       var element = $(arguments[i]);

       element.style.display = 'none';

     }

   },

 

   show: function() {

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

       var element = $(arguments[i]);

       element.style.display = '';

     }

   },

 

   remove: function(element) {

     element = $(element);

     element.parentNode.removeChild(element);

   },

 

   update: function(element, html) {

     $(element).innerHTML = html.stripScripts();

     setTimeout(function() {html.evalScripts()}, 10);

   },

 

   getHeight: function(element) {

     element = $(element);

     return element.offsetHeight;

   },

 

   classNames: function(element) {

     return new Element.ClassNames(element);

   },

 

   hasClassName: function(element, className) {

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

     return Element.classNames(element).include(className);

   },

 

   addClassName: function(element, className) {

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

     return Element.classNames(element).add(className);

   },

 

   removeClassName: function(element, className) {

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

     return Element.classNames(element).remove(className);

   },

 

   // removes whitespace-only text node children

   cleanWhitespace: function(element) {

     element = $(element);

     for (var i = 0; i < element.childNodes.length; i++) {

       var node = element.childNodes[i];

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

         Element.remove(node);

     }

   },

 

   empty: function(element) {

     return $(element).innerHTML.match(/^\s*$/);

   },

 

   scrollTo: function(element) {

     element = $(element);

     var x = element.x ? element.x : element.offsetLeft,

         y = element.y ? element.y : element.offsetTop;

     window.scrollTo(x, y);

   },

 

   getStyle: function(element, style) {

     element = $(element);

     var value = element.style[style.camelize()];

     if (!value) {

       if (document.defaultView && document.defaultView.getComputedStyle) {

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

         value = css ? css.getPropertyValue(style) : null;

       } else if (element.currentStyle) {

         value = element.currentStyle[style.camelize()];

       }

     }

 

     if (window.opera && ['left', 'top', 'right', 'bottom'].include(style))

       if (Element.getStyle(element, 'position') == 'static') value = 'auto';

 

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

   },

 

   setStyle: function(element, style) {

     element = $(element);

     for (name in style)

       element.style[name.camelize()] = style[name];

   },

 

   getDimensions: function(element) {

     element = $(element);

     if (Element.getStyle(element, 'display') != 'none')

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

 

     // All *Width and *Height properties give 0 on elements with display none,

     // so enable the element temporarily

     var els = element.style;

     var originalVisibility = els.visibility;

     var originalPosition = els.position;

     els.visibility = 'hidden';

     els.position = 'absolute';

     els.display = '';

     var originalWidth = element.clientWidth;

     var originalHeight = element.clientHeight;

     els.display = 'none';

     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';

       // Opera returns the offset relative to the positioning context, when an

       // element is position relative but top and left have not been defined

       if (window.opera) {

         element.style.top = 0;

         element.style.left = 0;

       }

     }

   },

 

   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 = '';

     }

   },

 

   makeClipping: function(element) {

     element = $(element);

     if (element._overflow) return;

     element._overflow = element.style.overflow;

     if ((Element.getStyle(element, 'overflow') || 'visible') != 'hidden')

       element.style.overflow = 'hidden';

   },

 

   undoClipping: function(element) {

     element = $(element);

     if (element._overflow) return;

     element.style.overflow = element._overflow;

     element._overflow = undefined;

   }

 });

 

 var Toggle = new Object();

 Toggle.display = Element.toggle;

 

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

 

 Abstract.Insertion = function(adjacency) {

   this.adjacency = adjacency;

 }

 

 Abstract.Insertion.prototype = {

   initialize: function(element, content) {

     this.element = $(element);

     this.content = content.stripScripts();

 

     if (this.adjacency && this.element.insertAdjacentHTML) {

       try {

         this.element.insertAdjacentHTML(this.adjacency, this.content);

       } catch (e) {

         if (this.element.tagName.toLowerCase() == 'tbody') {

           this.insertContent(this.contentFromAnonymousTable());

         } else {

           throw e;

         }

       }

     } else {

       this.range = this.element.ownerDocument.createRange();

       if (this.initializeRange) this.initializeRange();

       this.insertContent([this.range.createContextualFragment(this.content)]);

     }

 

     setTimeout(function() {content.evalScripts()}, 10);

   },

 

   contentFromAnonymousTable: function() {

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

     div.innerHTML = '<table><tbody>' + this.content + '</tbody></table>';

     return $A(div.childNodes[0].childNodes[0].childNodes);

   }

 }

 

 var Insertion = new Object();

 

 Insertion.Before = Class.create();

 Insertion.Before.prototype = Object.extend(new Abstract.Insertion('beforeBegin'), {

   initializeRange: function() {

     this.range.setStartBefore(this.element);

   },

 

   insertContent: function(fragments) {

     fragments.each((function(fragment) {

       this.element.parentNode.insertBefore(fragment, this.element);

     }).bind(this));

   }

 });

 

 Insertion.Top = Class.create();

 Insertion.Top.prototype = Object.extend(new Abstract.Insertion('afterBegin'), {

   initializeRange: function() {

     this.range.selectNodeContents(this.element);

     this.range.collapse(true);

   },

 

   insertContent: function(fragments) {

     fragments.reverse(false).each((function(fragment) {

       this.element.insertBefore(fragment, this.element.firstChild);

     }).bind(this));

   }

 });

 

 Insertion.Bottom = Class.create();

 Insertion.Bottom.prototype = Object.extend(new Abstract.Insertion('beforeEnd'), {

   initializeRange: function() {

     this.range.selectNodeContents(this.element);

     this.range.collapse(this.element);

   },

 

   insertContent: function(fragments) {

     fragments.each((function(fragment) {

       this.element.appendChild(fragment);

     }).bind(this));

   }

 });

 

 Insertion.After = Class.create();

 Insertion.After.prototype = Object.extend(new Abstract.Insertion('afterEnd'), {

   initializeRange: function() {

     this.range.setStartAfter(this.element);

   },

 

   insertContent: function(fragments) {

     fragments.each((function(fragment) {

       this.element.parentNode.insertBefore(fragment,

         this.element.nextSibling);

     }).bind(this));

   }

 });

 

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

 

 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(this.toArray().concat(classNameToAdd).join(' '));

   },

 

   remove: function(classNameToRemove) {

     if (!this.include(classNameToRemove)) return;

     this.set(this.select(function(className) {

       return className != classNameToRemove;

     }).join(' '));

   },

 

   toString: function() {

     return this.toArray().join(' ');

   }

 }

 

 Object.extend(Element.ClassNames.prototype, Enumerable);

 var Field = {

   clear: function() {

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

       $(arguments[i]).value = '';

   },

 

   focus: function(element) {

     $(element).focus();

   },

 

   present: function() {

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

       if ($(arguments[i]).value == '') return false;

     return true;

   },

 

   select: function(element) {

     $(element).select();

   },

 

   activate: function(element) {

     element = $(element);

     element.focus();

     if (element.select)

       element.select();

   }

 }

 

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

 

 var Form = {

   serialize: function(form) {

     var elements = Form.getElements($(form));

     var queryComponents = new Array();

 

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

       var queryComponent = Form.Element.serialize(elements[i]);

       if (queryComponent)

         queryComponents.push(queryComponent);

     }

 

     return queryComponents.join('&');

   },

 

   getElements: function(form) {

     form = $(form);

     var elements = new Array();

 

     for (tagName in Form.Element.Serializers) {

       var tagElements = form.getElementsByTagName(tagName);

       for (var j = 0; j < tagElements.length; j++)

         elements.push(tagElements[j]);

     }

     return elements;

   },

 

   getInputs: function(form, typeName, name) {

     form = $(form);

     var inputs = form.getElementsByTagName('input');

 

     if (!typeName && !name)

       return inputs;

 

     var matchingInputs = new Array();

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

       var input = inputs[i];

       if ((typeName && input.type != typeName) ||

           (name && input.name != name))

         continue;

       matchingInputs.push(input);

     }

 

     return matchingInputs;

   },

 

   disable: function(form) {

     var elements = Form.getElements(form);

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

       var element = elements[i];

       element.blur();

       element.disabled = 'true';

     }

   },

 

   enable: function(form) {

     var elements = Form.getElements(form);

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

       var element = elements[i];

       element.disabled = '';

     }

   },

 

   findFirstElement: function(form) {

     return Form.getElements(form).find(function(element) {

       return element.type != 'hidden' && !element.disabled &&

         ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());

     });

   },

 

   focusFirstElement: function(form) {

     Field.activate(Form.findFirstElement(form));

   },

 

   reset: function(form) {

     $(form).reset();

   }

 }

 

 Form.Element = {

   serialize: function(element) {

     element = $(element);

     var method = element.tagName.toLowerCase();

     var parameter = Form.Element.Serializers[method](element);

 

     if (parameter) {

       var key = encodeURIComponent(parameter[0]);

       if (key.length == 0) return;

 

       if (parameter[1].constructor != Array)

         parameter[1] = [parameter[1]];

 

       return parameter[1].map(function(value) {

         return key + '=' + encodeURIComponent(value);

       }).join('&');

     }

   },

 

   getValue: function(element) {

     element = $(element);

     var method = element.tagName.toLowerCase();

     var parameter = Form.Element.Serializers[method](element);

 

     if (parameter)

       return parameter[1];

   }

 }

 

 Form.Element.Serializers = {

   input: function(element) {

     switch (element.type.toLowerCase()) {

       case 'submit':

       case 'hidden':

       case 'password':

       case 'text':

         return Form.Element.Serializers.textarea(element);

       case 'checkbox':

       case 'radio':

         return Form.Element.Serializers.inputSelector(element);

     }

     return false;

   },

 

   inputSelector: function(element) {

     if (element.checked)

       return [element.name, element.value];

   },

 

   textarea: function(element) {

     return [element.name, element.value];

   },

 

   select: function(element) {

     return Form.Element.Serializers[element.type == 'select-one' ?

       'selectOne' : 'selectMany'](element);

   },

 

   selectOne: function(element) {

     var value = '', opt, index = element.selectedIndex;

     if (index >= 0) {

       opt = element.options[index];

       value = opt.value;

       if (!value && !('value' in opt))

         value = opt.text;

     }

     return [element.name, value];

   },

 

   selectMany: function(element) {

     var value = new Array();

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

       var opt = element.options[i];

       if (opt.selected) {

         var optValue = opt.value;

         if (!optValue && !('value' in opt))

           optValue = opt.text;

         value.push(optValue);

       }

     }

     return [element.name, value];

   }

 }

 

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

 

 var $F = Form.Element.getValue;

 

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

 

 Abstract.TimedObserver = function() {}

 Abstract.TimedObserver.prototype = {

   initialize: function(element, frequency, callback) {

     this.frequency = frequency;

     this.element   = $(element);

     this.callback  = callback;

 

     this.lastValue = this.getValue();

     this.registerCallback();

   },

 

   registerCallback: function() {

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

   },

 

   onTimerEvent: function() {

     var value = this.getValue();

     if (this.lastValue != value) {

       this.callback(this.element, value);

       this.lastValue = value;

     }

   }

 }

 

 Form.Element.Observer = Class.create();

 Form.Element.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {

   getValue: function() {

     return Form.Element.getValue(this.element);

   }

 });

 

 Form.Observer = Class.create();

 Form.Observer.prototype = Object.extend(new Abstract.TimedObserver(), {

   getValue: function() {

     return Form.serialize(this.element);

   }

 });

 

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

 

 Abstract.EventObserver = function() {}

 Abstract.EventObserver.prototype = {

   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() {

     var elements = Form.getElements(this.element);

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

       this.registerCallback(elements[i]);

   },

 

   registerCallback: function(element) {

     if (element.type) {

       switch (element.type.toLowerCase()) {

         case 'checkbox':

         case 'radio':

           Event.observe(element, 'click', this.onElementEvent.bind(this));

           break;

         case 'password':

         case 'text':

         case 'textarea':

         case 'select-one':

         case 'select-multiple':

           Event.observe(element, 'change', this.onElementEvent.bind(this));

           break;

       }

     }

   }

 }

 

 Form.Element.EventObserver = Class.create();

 Form.Element.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {

   getValue: function() {

     return Form.Element.getValue(this.element);

   }

 });

 

 Form.EventObserver = Class.create();

 Form.EventObserver.prototype = Object.extend(new Abstract.EventObserver(), {

   getValue: function() {

     return Form.serialize(this.element);

   }

 });

 if (!window.Event) {

   var Event = new Object();

 }

 

 Object.extend(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,

 

   element: function(event) {

     return event.target || event.srcElement;

   },

 

   isLeftClick: function(event) {

     return (((event.which) && (event.which == 1)) ||

             ((event.button) && (event.button == 1)));

   },

 

   pointerX: function(event) {

     return event.pageX || (event.clientX +

       (document.documentElement.scrollLeft || document.body.scrollLeft));

   },

 

   pointerY: function(event) {

     return event.pageY || (event.clientY +

       (document.documentElement.scrollTop || document.body.scrollTop));

   },

 

   stop: function(event) {

     if (event.preventDefault) {

       event.preventDefault();

       event.stopPropagation();

     } else {

       event.returnValue = false;

       event.cancelBubble = true;

     }

   },

 

   // find the first node with the given tagName, starting from the

   // node the event was triggered on; traverses the DOM upwards

   findElement: function(event, tagName) {

     var element = Event.element(event);

     while (element.parentNode && (!element.tagName ||

         (element.tagName.toUpperCase() != tagName.toUpperCase())))

       element = element.parentNode;

     return element;

   },

 

   observers: false,

 

   _observeAndCache: function(element, name, observer, useCapture) {

     if (!this.observers) this.observers = [];

     if (element.addEventListener) {

       this.observers.push([element, name, observer, useCapture]);

       element.addEventListener(name, observer, useCapture);

     } else if (element.attachEvent) {

       this.observers.push([element, name, observer, useCapture]);

       element.attachEvent('on' + name, observer);

     }

   },

 

   unloadCache: function() {

     if (!Event.observers) return;

     for (var i = 0; i < Event.observers.length; i++) {

       Event.stopObserving.apply(this, Event.observers[i]);

       Event.observers[i][0] = null;

     }

     Event.observers = false;

   },

 

   observe: function(element, name, observer, useCapture) {

     var element = $(element);

     useCapture = useCapture || false;

 

     if (name == 'keypress' &&

         (navigator.appVersion.match(/Konqueror|Safari|KHTML/)

         || element.attachEvent))

       name = 'keydown';

 

     this._observeAndCache(element, name, observer, useCapture);

   },

 

   stopObserving: function(element, name, observer, useCapture) {

     var element = $(element);

     useCapture = useCapture || false;

 

     if (name == 'keypress' &&

         (navigator.appVersion.match(/Konqueror|Safari|KHTML/)

         || element.detachEvent))

       name = 'keydown';

 

     if (element.removeEventListener) {

       element.removeEventListener(name, observer, useCapture);

     } else if (element.detachEvent) {

       element.detachEvent('on' + name, observer);

     }

   }

 });

 

 /* prevent memory leaks in IE */

 Event.observe(window, 'unload', Event.unloadCache, false);

 var Position = {

   // set to true if needed, warning: firefox performance problems

   // NOT neeeded for page scrolling, only if draggable contained in

   // scrollable elements

   includeScrollOffsets: false,

 

   // must be called before calling withinIncludingScrolloffset, every time the

   // page is scrolled

   prepare: function() {

     this.deltaX =  window.pageXOffset

                 || document.documentElement.scrollLeft

                 || document.body.scrollLeft

                 || 0;

     this.deltaY =  window.pageYOffset

                 || document.documentElement.scrollTop

                 || document.body.scrollTop

                 || 0;

   },

 

   realOffset: function(element) {

     var valueT = 0, valueL = 0;

     do {

       valueT += element.scrollTop  || 0;

       valueL += element.scrollLeft || 0;

       element = element.parentNode;

     } while (element);

     return [valueL, valueT];

   },

 

   cumulativeOffset: function(element) {

     var valueT = 0, valueL = 0;

     do {

       valueT += element.offsetTop  || 0;

       valueL += element.offsetLeft || 0;

       element = element.offsetParent;

     } while (element);

     return [valueL, valueT];

   },

 

   positionedOffset: function(element) {

     var valueT = 0, valueL = 0;

     do {

       valueT += element.offsetTop  || 0;

       valueL += element.offsetLeft || 0;

       element = element.offsetParent;

       if (element) {

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

         if (p == 'relative' || p == 'absolute') break;

       }

     } while (element);

     return [valueL, valueT];

   },

 

   offsetParent: 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;

   },

 

   // caches x/y coordinate pair to use with overlap

   within: function(element, x, y) {

     if (this.includeScrollOffsets)

       return this.withinIncludingScrolloffsets(element, x, y);

     this.xcomp = x;

     this.ycomp = y;

     this.offset = this.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 = this.realOffset(element);

 

     this.xcomp = x + offsetcache[0] - this.deltaX;

     this.ycomp = y + offsetcache[1] - this.deltaY;

     this.offset = this.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);

   },

 

   // within must be called directly before

   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;

   },

 

   clone: function(source, target) {

     source = $(source);

     target = $(target);

     target.style.position = 'absolute';

     var offsets = this.cumulativeOffset(source);

     target.style.top    = offsets[1] + 'px';

     target.style.left   = offsets[0] + 'px';

     target.style.width  = source.offsetWidth + 'px';

     target.style.height = source.offsetHeight + 'px';

   },

 

   page: function(forElement) {

     var valueT = 0, valueL = 0;

 

     var element = forElement;

     do {

       valueT += element.offsetTop  || 0;

       valueL += element.offsetLeft || 0;

 

       // Safari fix

       if (element.offsetParent==document.body)

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

 

     } while (element = element.offsetParent);

 

     element = forElement;

     do {

       valueT -= element.scrollTop  || 0;

       valueL -= element.scrollLeft || 0;

     } while (element = element.parentNode);

 

     return [valueL, valueT];

   },

 

   clone: function(source, target) {

     var options = Object.extend({

       setLeft:    true,

       setTop:     true,

       setWidth:   true,

       setHeight:  true,

       offsetTop:  0,

       offsetLeft: 0

     }, arguments[2] || {})

 

     // find page position of source

     source = $(source);

     var p = Position.page(source);

 

     // find coordinate system to use

     target = $(target);

     var delta = [0, 0];

     var parent = null;

     // delta [0,0] will do fine with position: fixed elements,

     // position:absolute needs offsetParent deltas

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

       parent = Position.offsetParent(target);

       delta = Position.page(parent);

     }

 

     // correct by body offsets (fixes Safari)

     if (parent == document.body) {

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

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

     }

 

     // set position

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

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

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

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

   },

 

   absolutize: function(element) {

     element = $(element);

     if (element.style.position == 'absolute') return;

     Position.prepare();

 

     var offsets = Position.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';;

   },

 

   relativize: function(element) {

     element = $(element);

     if (element.style.position == 'relative') return;

     Position.prepare();

 

     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;

   }

 }

 

 // Safari returns margins on body which is incorrect if the child is absolutely

 // positioned.  For performance reasons, redefine Position.cumulativeOffset for

 // KHTML/WebKit only.

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

   Position.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 [valueL, valueT];

   }

 }