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From 2010.igem.org

/* Prototype JavaScript framework, version 1.5.0_rc2

*  (c) 2005, 2006 Sam Stephenson <sam@conio.net>
*
*  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: '1.5.0_rc2',
 BrowserFeatures: {
   XPath: !!document.evaluate
 },

 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 (var property in source) {
   destination[property] = source[property];
 }
 return destination;

}

Object.extend(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;
   }
 },

 keys: function(object) {
   var keys = [];
   for (var property in object)
     keys.push(property);
   return keys;
 },

 values: function(object) {
   var values = [];
   for (var property in object)
     values.push(object[property]);
   return values;
 },

 clone: function(object) {
   return Object.extend({}, object);
 }

});

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, args = $A(arguments), object = args.shift();
 return function(event) {
   return __method.apply(object, [( event || window.event)].concat(args).concat($A(arguments)));
 }

}

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, length = arguments.length; i < 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() {
   this.timer = setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
 },

 stop: function() {
   if (!this.timer) return;
   clearInterval(this.timer);
   this.timer = null;
 },

 onTimerEvent: function() {
   if (!this.currentlyExecuting) {
     try {
       this.currentlyExecuting = true;
       this.callback(this);
     } finally {
       this.currentlyExecuting = false;
     }
   }
 }

} Object.extend(String.prototype, {

 gsub: function(pattern, replacement) {
   var result = , source = this, match;
   replacement = arguments.callee.prepareReplacement(replacement);

   while (source.length > 0) {
     if (match = source.match(pattern)) {
       result += source.slice(0, match.index);
       result += (replacement(match) || ).toString();
       source  = source.slice(match.index + match[0].length);
     } else {
       result += source, source = ;
     }
   }
   return result;
 },

 sub: function(pattern, replacement, count) {
   replacement = this.gsub.prepareReplacement(replacement);
   count = count === undefined ? 1 : count;

   return this.gsub(pattern, function(match) {
     if (--count < 0) return match[0];
     return replacement(match);
   });
 },

 scan: function(pattern, iterator) {
   this.gsub(pattern, iterator);
   return this;
 },

 truncate: function(length, truncation) {
   length = length || 30;
   truncation = truncation === undefined ? '...' : truncation;
   return this.length > length ?
     this.slice(0, length - truncation.length) + truncation : this;
 },

 strip: function() {
   return this.replace(/^\s+/, ).replace(/\s+$/, );
 },

 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(function(script) { return eval(script) });
 },

 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.length > 1 ?
     $A(div.childNodes).inject(,function(memo,node){ return memo+node.nodeValue }) :
     div.childNodes[0].nodeValue) : ;
 },

 toQueryParams: function(separator) {
   var match = this.strip().match(/([^?#]*)(#.*)?$/);
   if (!match) return {};

   return match[1].split(separator || '&').inject({}, function(hash, pair) {
     if ((pair = pair.split('='))[0]) {
       var name = decodeURIComponent(pair[0]);
       var value = pair[1] ? decodeURIComponent(pair[1]) : undefined;

       if (hash[name] !== undefined) {
         if (hash[name].constructor != Array)
           hash[name] = [hash[name]];
         if (value) hash[name].push(value);
       }
       else hash[name] = value;
     }
     return hash;
   });
 },

 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, length = oStringList.length; i < length; i++) {
     var s = oStringList[i];
     camelizedString += s.charAt(0).toUpperCase() + s.substring(1);
   }

   return camelizedString;
 },

 underscore: function() {
   return this.gsub(/::/, '/').gsub(/([A-Z]+)([A-Z][a-z])/,'#{1}_#{2}').gsub(/([a-z\d])([A-Z])/,'#{1}_#{2}').gsub(/-/,'-').toLowerCase();
 },

 dasherize: function() {
   return this.gsub(/_/,'-');
 },

 inspect: function(useDoubleQuotes) {
   var escapedString = this.replace(/\\/g, '\\\\');
   if (useDoubleQuotes)
     return '"' + escapedString.replace(/"/g, '\\"') + '"';
   else
     return "'" + escapedString.replace(/'/g, '\\\) + "'";
 }

});

String.prototype.gsub.prepareReplacement = function(replacement) {

 if (typeof replacement == 'function') return replacement;
 var template = new Template(replacement);
 return function(match) { return template.evaluate(match) };

}

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

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

 initialize: function(template, pattern) {
   this.template = template.toString();
   this.pattern  = pattern || Template.Pattern;
 },

 evaluate: function(object) {
   return this.template.gsub(this.pattern, function(match) {
     var before = match[1];
     if (before == '\\') return match[2];
     return before + (object[match[3]] || ).toString();
   });
 }

}

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;
   }
   return this;
 },

 eachSlice: function(number, iterator) {
   var index = -number, slices = [], array = this.toArray();
   while ((index += number) < array.length)
     slices.push(array.slice(index, index+number));
   return slices.collect(iterator || Prototype.K);
 },

 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 = false;
   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;
 },

 inGroupsOf: function(number, fillWith) {
   fillWith = fillWith || null;
   var results = this.eachSlice(number);
   if (results.length > 0) (number - results.last().length).times(function() {
     results.last().push(fillWith)
   });
   return results;
 },

 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 (result == undefined || value >= result)
       result = value;
   });
   return result;
 },

 min: function(iterator) {
   var result;
   this.each(function(value, index) {
     value = (iterator || Prototype.K)(value, index);
     if (result == undefined || value < result)
       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) {
     return iterator(collections.pluck(index));
   });
 },

 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, length = iterable.length; i < length; i++)
     results.push(iterable[i]);
   return results;
 }

}

Object.extend(Array.prototype, Enumerable);

if (!Array.prototype._reverse)

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

Object.extend(Array.prototype, {

 _each: function(iterator) {
   for (var i = 0, length = this.length; i < 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 && 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, length = this.length; i < length; i++)
     if (this[i] == object) return i;
   return -1;
 },

 reverse: function(inline) {
   return (inline !== false ? this : this.toArray())._reverse();
 },

 reduce: function() {
   return this.length > 1 ? this : this[0];
 },

 uniq: function() {
   return this.inject([], function(array, value) {
     return array.include(value) ? array : array.concat([value]);
   });
 },

 clone: function() {
   return [].concat(this);
 },

 inspect: function() {
   return '[' + this.map(Object.inspect).join(', ') + ']';
 }

});

Array.prototype.toArray = Array.prototype.clone;

if(window.opera){

 Array.prototype.concat = function(){
   var array = [];
   for(var i = 0, length = this.length; i < length; i++) array.push(this[i]);
   for(var i = 0, length = arguments.length; i < length; i++) {
     if(arguments[i].constructor == Array) {
       for(var j = 0, arrayLength = arguments[i].length; j < arrayLength; j++)
         array.push(arguments[i][j]);
     } else {
       array.push(arguments[i]);
     }
   }
   return array;
 }

} var Hash = {

 _each: function(iterator) {
   for (var 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(this, function(mergedHash, pair) {
     mergedHash[pair.key] = pair.value;
     return mergedHash;
   });
 },

 toQueryString: function() {
   return this.map(function(pair) {
     if (!pair.key) return null;

     if (pair.value && pair.value.constructor == Array) {
       pair.value = pair.value.compact();

       if (pair.value.length < 2) {
         pair.value = pair.value.reduce();
       } else {
         var key = encodeURIComponent(pair.key);
         return pair.value.map(function(value) {
           return key + '=' + encodeURIComponent(value);

}).join('&');

       }
     }

     if (pair.value == undefined) pair[1] = ;
     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;
   while (this.include(value)) {
     iterator(value);
     value = value.succ();
   }
 },

 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 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 (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,
     contentType:  'application/x-www-form-urlencoded',
     encoding:     'UTF-8',
     parameters:   
   }
   Object.extend(this.options, options || {});

   this.options.method = this.options.method.toLowerCase();
   this.options.parameters = $H(typeof this.options.parameters == 'string' ?
     this.options.parameters.toQueryParams() : this.options.parameters);
 }

}

Ajax.Request = Class.create(); Ajax.Request.Events =

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

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

 _complete: false,

 initialize: function(url, options) {
   this.transport = Ajax.getTransport();
   this.setOptions(options);
   this.request(url);
 },

 request: function(url) {
   var params = this.options.parameters;
   if (params.any()) params['_'] = ;

   if (!['get', 'post'].include(this.options.method)) {
     // simulate other verbs over post
     params['_method'] = this.options.method;
     this.options.method = 'post';
   }

   this.url = url;

   // when GET, append parameters to URL
   if (this.options.method == 'get' && params.any())
     this.url += (this.url.indexOf('?') >= 0 ? '&' : '?') +
       params.toQueryString();

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

     this.transport.open(this.options.method.toUpperCase(), this.url,
       this.options.asynchronous, this.options.username,
       this.options.password);

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

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

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

     this.transport.send(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.options.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';
   }

   // user-defined headers
   if (typeof this.options.requestHeaders == 'object') {
     var extras = this.options.requestHeaders;

     if (typeof extras.push == 'function')
       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() {
   return !this.transport.status
       || (this.transport.status >= 200 && this.transport.status < 300);
 },

 respondToReadyState: function(readyState) {
   var state = Ajax.Request.Events[readyState];
   var transport = this.transport, json = this.evalJSON();

   if (state == 'Complete') {
     try {
       this._complete = true;
       (this.options['on' + this.transport.status]
        || this.options['on' + (this.success() ? 'Success' : 'Failure')]
        || Prototype.emptyFunction)(transport, json);
     } catch (e) {
       this.dispatchException(e);
     }
   }

   try {
     (this.options['on' + state] || Prototype.emptyFunction)(transport, json);
     Ajax.Responders.dispatch('on' + state, this, transport, json);
   } catch (e) {
     this.dispatchException(e);
   }

   if (state == 'Complete') {
     if ((this.getHeader('Content-type') || ).strip().
       match(/^(text|application)\/(x-)?(java|ecma)script(;.*)?$/i))
         this.evalResponse();

     // avoid memory leak in MSIE: clean up
     this.transport.onreadystatechange = Prototype.emptyFunction;
   }
 },

 getHeader: function(name) {
   try {
     return this.transport.getResponseHeader(name);
   } catch (e) { return null }
 },

 evalJSON: function() {
   try {
     var json = this.getHeader('X-JSON');
     return json ? eval('(' + json + ')') : null;
   } catch (e) { return null }
 },

 evalResponse: function() {
   try {
     return eval(this.transport.responseText);
   } catch (e) {
     this.dispatchException(e);
   }
 },

 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.container = {
     success: (container.success || 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, param) {
     this.updateContent();
     onComplete(transport, param);
   }).bind(this);

   this.request(url);
 },

 updateContent: function() {
   var receiver = this.container[this.success() ? 'success' : 'failure'];
   var response = this.transport.responseText;

   if (!this.options.evalScripts) response = response.stripScripts();

   if (receiver = $(receiver)) {
     if (this.options.insertion)
       new this.options.insertion(receiver, response);
     else
       receiver.update(response);
   }

   if (this.success()) {
     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.options.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);
 }

}); function $(element) {

 if (arguments.length > 1) {
   for (var i = 0, elements = [], length = arguments.length; i < length; i++)
     elements.push($(arguments[i]));
   return elements;
 }
 if (typeof element == 'string')
   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(query.snapshotItem(i));
   return results;
 }

}

document.getElementsByClassName = function(className, parentElement) {

 if (Prototype.BrowserFeatures.XPath) {
   var q = ".//*[contains(concat(' ', @class, ' '), ' " + className + " ')]";
   return document._getElementsByXPath(q, parentElement);
 } else {
   var children = ($(parentElement) || document.body).getElementsByTagName('*');
   var elements = [], child;
   for (var i = 0, length = children.length; i < length; i++) {
     child = children[i];
     if (Element.hasClassName(child, className))
       elements.push(Element.extend(child));
   }
   return elements;
 }

}

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

if (!window.Element)

 var Element = new Object();

Element.extend = function(element) {

 if (!element) return;
 if (_nativeExtensions || element.nodeType == 3) return element;

 if (!element._extended && element.tagName && element != window) {
   var methods = Object.clone(Element.Methods), cache = Element.extend.cache;

   if (element.tagName == 'FORM')
     Object.extend(methods, Form.Methods);
   if (['INPUT', 'TEXTAREA', 'SELECT'].include(element.tagName))
     Object.extend(methods, Form.Element.Methods);

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

   for (var property in methods) {
     var value = methods[property];
     if (typeof value == 'function' && !(property in element))
       element[property] = cache.findOrStore(value);
   }
 }

 element._extended = true;
 return element;

}

Element.extend.cache = {

 findOrStore: function(value) {
   return this[value] = this[value] || function() {
     return value.apply(null, [this].concat($A(arguments)));
   }
 }

}

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).style.display = 'none';
   return element;
 },

 show: function(element) {
   $(element).style.display = ;
   return element;
 },

 remove: function(element) {
   element = $(element);
   element.parentNode.removeChild(element);
   return element;
 },

 update: function(element, html) {
   html = typeof html == 'undefined' ?  : html.toString();
   $(element).innerHTML = html.stripScripts();
   setTimeout(function() {html.evalScripts()}, 10);
   return element;
 },

 replace: function(element, html) {
   element = $(element);
   if (element.outerHTML) {
     element.outerHTML = html.stripScripts();
   } else {
     var range = element.ownerDocument.createRange();
     range.selectNodeContents(element);
     element.parentNode.replaceChild(
       range.createContextualFragment(html.stripScripts()), element);
   }
   setTimeout(function() {html.evalScripts()}, 10);
   return element;
 },

 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('parentNode');
 },

 descendants: function(element) {
   element = $(element);
   return $A(element.getElementsByTagName('*'));
 },

 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('previousSibling');
 },

 nextSiblings: function(element) {
   return $(element).recursivelyCollect('nextSibling');
 },

 siblings: function(element) {
   element = $(element);
   return element.previousSiblings().reverse().concat(element.nextSiblings());
 },

 match: function(element, selector) {
   element = $(element);
   if (typeof selector == 'string')
     selector = new Selector(selector);
   return selector.match(element);
 },

 up: function(element, expression, index) {
   return Selector.findElement($(element).ancestors(), expression, index);
 },

 down: function(element, expression, index) {
   return Selector.findElement($(element).descendants(), expression, index);
 },

 previous: function(element, expression, index) {
   return Selector.findElement($(element).previousSiblings(), expression, index);
 },

 next: function(element, expression, index) {
   return Selector.findElement($(element).nextSiblings(), expression, index);
 },

 getElementsBySelector: function() {
   var args = $A(arguments), element = $(args.shift());
   return Selector.findChildElements(element, args);
 },

 getElementsByClassName: function(element, className) {
   element = $(element);
   return document.getElementsByClassName(className, element);
 },

 readAttribute: function(element, name) {
   return $(element).getAttribute(name);
 },

 getHeight: function(element) {
   element = $(element);
   return element.offsetHeight;
 },

 classNames: function(element) {
   return new Element.ClassNames(element);
 },

 hasClassName: function(element, className) {
   if (!(element = $(element))) return;
   var elementClassName = element.className;
   if (elementClassName.length == 0) return false;
   if (elementClassName == className ||
       elementClassName.match(new RegExp("(^|\\s)" + className + "(\\s|$)")))
     return true;
   return false;
 },

 addClassName: function(element, className) {
   if (!(element = $(element))) return;
   Element.classNames(element).add(className);
   return element;
 },

 removeClassName: function(element, className) {
   if (!(element = $(element))) return;
   Element.classNames(element).remove(className);
   return element;
 },

 observe: function() {
   Event.observe.apply(Event, arguments);
   return $A(arguments).first();
 },

 stopObserving: function() {
   Event.stopObserving.apply(Event, arguments);
   return $A(arguments).first();
 },

 // removes whitespace-only text node children
 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 $(element).innerHTML.match(/^\s*$/);
 },

 childOf: function(element, ancestor) {
   element = $(element), ancestor = $(ancestor);
   while (element = element.parentNode)
     if (element == ancestor) return true;
   return false;
 },

 scrollTo: function(element) {
   element = $(element);
   var x = element.x ? element.x : element.offsetLeft,
       y = element.y ? element.y : element.offsetTop;
   window.scrollTo(x, y);
   return element;
 },

 getStyle: function(element, style) {
   element = $(element);
   var inline = (style == 'float' ?
     (typeof element.style.styleFloat != 'undefined' ? 'styleFloat' : 'cssFloat') : style);
   var value = element.style[inline.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[inline.camelize()];
     }
   }

   if((value == 'auto') && ['width','height'].include(style) && (element.getStyle('display') != 'none'))
     value = element['offset'+style.charAt(0).toUpperCase()+style.substring(1)] + 'px';

   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 (var name in style)
     element.style[ (name == 'float' ?
       ((typeof element.style.styleFloat != 'undefined') ? 'styleFloat' : 'cssFloat') : name).camelize()
     ] = style[name];
   return element;
 },

 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;
     }
   }
   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.style.overflow || 'auto';
   if ((Element.getStyle(element, 'overflow') || 'visible') != '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;
 }

}

Element.Methods.Simulated = {

 hasAttribute: function(element, attribute) {
   return $(element).getAttributeNode(attribute).specified;
 }

}

// IE is missing .innerHTML support for TABLE-related elements if(document.all){

 Element.Methods.update = function(element, html) {
   element = $(element);
   html = typeof html == 'undefined' ?  : html.toString();
   var tagName = element.tagName.toUpperCase();
   if (['THEAD','TBODY','TR','TD'].include(tagName)) {
     var div = document.createElement('div');
     switch (tagName) {
       case 'THEAD':
       case 'TBODY':

div.innerHTML = '<tbody>' + html.stripScripts() + '</tbody>';

         depth = 2;
         break;
       case 'TR':

div.innerHTML = '<tbody>' + html.stripScripts() + '</tbody>';

         depth = 3;
         break;
       case 'TD':

div.innerHTML = '<tbody></tbody>

' + html.stripScripts() + '

';

         depth = 4;
     }
     $A(element.childNodes).each(function(node){
       element.removeChild(node)
     });
     depth.times(function(){ div = div.firstChild });

     $A(div.childNodes).each(
       function(node){ element.appendChild(node) });
   } else {
     element.innerHTML = html.stripScripts();
   }
   setTimeout(function() {html.evalScripts()}, 10);
   return element;
 }

}

Object.extend(Element, Element.Methods);

var _nativeExtensions = false;

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

 [, 'Form', 'Input', 'TextArea', 'Select'].each(function(tag) {
   var className = 'HTML' + tag + 'Element';
   if(window[className]) return;
   var klass = window[className] = {};
   klass.prototype = document.createElement(tag ? tag.toLowerCase() : 'div').__proto__;
 });

Element.addMethods = function(methods) {

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

 function copy(methods, destination, onlyIfAbsent) {
   onlyIfAbsent = onlyIfAbsent || false;
   var cache = Element.extend.cache;
   for (var property in methods) {
     var value = methods[property];
     if (!onlyIfAbsent || !(property in destination))
       destination[property] = cache.findOrStore(value);
   }
 }

 if (typeof HTMLElement != 'undefined') {
   copy(Element.Methods, HTMLElement.prototype);
   copy(Element.Methods.Simulated, HTMLElement.prototype, true);
   copy(Form.Methods, HTMLFormElement.prototype);
   [HTMLInputElement, HTMLTextAreaElement, HTMLSelectElement].each(function(klass) {
     copy(Form.Element.Methods, klass.prototype);
   });
   _nativeExtensions = true;
 }

}

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) {
       var tagName = this.element.tagName.toUpperCase();
       if (['TBODY', 'TR'].include(tagName)) {
         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 = '<tbody>' + this.content + '</tbody>';

   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($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); var Selector = Class.create(); Selector.prototype = {

 initialize: function(expression) {
   this.params = {classNames: []};
   this.expression = expression.toString().strip();
   this.parseExpression();
   this.compileMatcher();
 },

 parseExpression: function() {
   function abort(message) { throw 'Parse error in selector: ' + message; }

   if (this.expression == )  abort('empty expression');

   var params = this.params, expr = this.expression, match, modifier, clause, rest;
   while (match = expr.match(/^(.*)\[([a-z0-9_:-]+?)(?:([~\|!]?=)(?:"([^"]*)"|([^\]\s]*)))?\]$/i)) {
     params.attributes = params.attributes || [];
     params.attributes.push({name: match[2], operator: match[3], value: match[4] || match[5] || });
     expr = match[1];
   }

   if (expr == '*') return this.params.wildcard = true;

   while (match = expr.match(/^([^a-z0-9_-])?([a-z0-9_-]+)(.*)/i)) {
     modifier = match[1], clause = match[2], rest = match[3];
     switch (modifier) {
       case '#':       params.id = clause; break;
       case '.':       params.classNames.push(clause); break;
       case :
       case undefined: params.tagName = clause.toUpperCase(); break;
       default:        abort(expr.inspect());
     }
     expr = rest;
   }

   if (expr.length > 0) abort(expr.inspect());
 },

 buildMatchExpression: function() {
   var params = this.params, conditions = [], clause;

   if (params.wildcard)
     conditions.push('true');
   if (clause = params.id)
     conditions.push('element.id == ' + clause.inspect());
   if (clause = params.tagName)
     conditions.push('element.tagName.toUpperCase() == ' + clause.inspect());
   if ((clause = params.classNames).length > 0)
     for (var i = 0, length = clause.length; i < length; i++)
       conditions.push('Element.hasClassName(element, ' + clause[i].inspect() + ')');
   if (clause = params.attributes) {
     clause.each(function(attribute) {
       var value = 'element.getAttribute(' + attribute.name.inspect() + ')';
       var splitValueBy = function(delimiter) {
         return value + ' && ' + value + '.split(' + delimiter.inspect() + ')';
       }

       switch (attribute.operator) {
         case '=':       conditions.push(value + ' == ' + attribute.value.inspect()); break;
         case '~=':      conditions.push(splitValueBy(' ') + '.include(' + attribute.value.inspect() + ')'); break;
         case '|=':      conditions.push(
                           splitValueBy('-') + '.first().toUpperCase() == ' + attribute.value.toUpperCase().inspect()
                         ); break;
         case '!=':      conditions.push(value + ' != ' + attribute.value.inspect()); break;
         case :
         case undefined: conditions.push(value + ' != null'); break;
         default:        throw 'Unknown operator ' + attribute.operator + ' in selector';
       }
     });
   }

   return conditions.join(' && ');
 },

 compileMatcher: function() {
   this.match = new Function('element', 'if (!element.tagName) return false; \
     return ' + this.buildMatchExpression());
 },

 findElements: function(scope) {
   var element;

   if (element = $(this.params.id))
     if (this.match(element))
       if (!scope || Element.childOf(element, scope))
         return [element];

   scope = (scope || document).getElementsByTagName(this.params.tagName || '*');

   var results = [];
   for (var i = 0, length = scope.length; i < length; i++)
     if (this.match(element = scope[i]))
       results.push(Element.extend(element));

   return results;
 },

 toString: function() {
   return this.expression;
 }

}

Object.extend(Selector, {

 matchElements: function(elements, expression) {
   var selector = new Selector(expression);
   return elements.select(selector.match.bind(selector)).collect(Element.extend);
 },

 findElement: function(elements, expression, index) {
   if (typeof expression == 'number') index = expression, expression = false;
   return Selector.matchElements(elements, expression || '*')[index || 0];
 },

 findChildElements: function(element, expressions) {
   return expressions.map(function(expression) {
     return expression.strip().split(/\s+/).inject([null], function(results, expr) {
       var selector = new Selector(expr);
       return results.inject([], function(elements, result) {
         return elements.concat(selector.findElements(result || element));
       });
     });
   }).flatten();
 }

});

function $$() {

 return Selector.findChildElements(document, $A(arguments));

} var Form = {

 reset: function(form) {
   $(form).reset();
   return form;
 },

 serializeElements: function(elements) {
   return elements.inject([], function(queryComponents, element) {
     var queryComponent = Form.Element.serialize(element);
     if (queryComponent) queryComponents.push(queryComponent);
     return queryComponents;
   }).join('&');
 }

};

Form.Methods = {

 serialize: function(form) {
   return Form.serializeElements($(form).getElements());
 },

 getElements: function(form) {
   return $A($(form).getElementsByTagName('*')).inject([],
     function(elements, child) {
       if (Form.Element.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 inputs;

   var matchingInputs = new Array();
   for (var i = 0, 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().each(function(element) {
     element.blur();
     element.disabled = 'true';
   });
   return form;
 },

 enable: function(form) {
   form = $(form);
   form.getElements().each(function(element) {
     element.disabled = ;
   });
   return form;
 },

 findFirstElement: function(form) {
   return $(form).getElements().find(function(element) {
     return element.type != 'hidden' && !element.disabled &&
       ['input', 'select', 'textarea'].include(element.tagName.toLowerCase());
   });
 },

 focusFirstElement: function(form) {
   form = $(form);
   form.findFirstElement().activate();
   return form;
 }

}

Object.extend(Form, Form.Methods);

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

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) return ;
   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];
 },

 clear: function(element) {
   $(element).value = ;
   return element;
 },

 present: function(element) {
   return $(element).value != ;
 },

 activate: function(element) {
   element = $(element);
   element.focus();
   if (element.select && ( element.tagName.toLowerCase() != 'input' ||
     !['button', 'reset', 'submit'].include(element.type) ) )
     element.select();
   return element;
 },

 disable: function(element) {
   element = $(element);
   element.disabled = true;
   return element;
 },

 enable: function(element) {
   element = $(element);
   element.blur();
   element.disabled = false;
   return element;
 }

}

Object.extend(Form.Element, Form.Element.Methods); var Field = Form.Element;

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

Form.Element.Serializers = {

 input: function(element) {
   switch (element.type.toLowerCase()) {
     case 'checkbox':
     case 'radio':
       return Form.Element.Serializers.inputSelector(element);
     default:
       return Form.Element.Serializers.textarea(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.extend(element.options[index]);
     // Uses the new potential extension if hasAttribute isn't native.
     value = opt.hasAttribute('value') ? opt.value : opt.text;
   }
   return [element.name, value];
 },

 selectMany: function(element) {
   var value = [];
   for (var i = 0, length = element.length; i < length; i++) {
     var opt = Element.extend(element.options[i]);
     if (opt.selected)
       // Uses the new potential extension if hasAttribute isn't native.
       value.push(opt.hasAttribute('value') ? opt.value : opt.text);
   }
   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() {
   Form.getElements(this.element).each(this.registerCallback.bind(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(); 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,
 KEY_HOME:     36,
 KEY_END:      35,
 KEY_PAGEUP:   33,
 KEY_PAGEDOWN: 34,

 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, length = Event.observers.length; i < length; i++) {
     Event.stopObserving.apply(this, Event.observers[i]);
     Event.observers[i][0] = null;
   }
   Event.observers = false;
 },

 observe: function(element, name, observer, useCapture) {
   element = $(element);
   useCapture = useCapture || false;

   if (name == 'keypress' &&
       (navigator.appVersion.match(/Konqueror|Safari|KHTML/)
       || element.attachEvent))
     name = 'keydown';

   Event._observeAndCache(element, name, observer, useCapture);
 },

 stopObserving: function(element, name, observer, useCapture) {
   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) {
     try {
       element.detachEvent('on' + name, observer);
     } catch (e) {}
   }
 }

});

/* prevent memory leaks in IE */ if (navigator.appVersion.match(/\bMSIE\b/))

 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) {
       if(element.tagName=='BODY') break;
       var 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;
 },

 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 {
     if (!window.opera || element.tagName=='BODY') {
       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];
 }

}

Element.addMethods();