/*  Prototype JavaScript framework, version 1.5.1_rc1
*  (c) 2005-2007 Sam Stephenson
*
*  Prototype is freely distributable under the terms of an MIT-style license.
*  For details, see the Prototype web site: http://www.prototypejs.org/
*
/*--------------------------------------------------------------------------*/

var Prototype = {
Version: '1.5.1_rc1',

Browser: {
IE:     !!(window.attachEvent && !window.opera),
Opera:  !!window.opera,
WebKit: navigator.userAgent.indexOf('AppleWebKit/') > -1,
Gecko:  navigator.userAgent.indexOf('Gecko') > -1 && navigator.userAgent.indexOf('KHTML') == -1
},
BrowserFeatures: {
XPath: !!document.evaluate,
ElementExtensions: !!window.HTMLElement,
SpecificElementExtensions:
(document.createElement('div').__proto__ !==
document.createElement('form').__proto__)
},

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;
		}
		},
		
		toJSON: function(object) {
		var type = typeof object;
		switch(type) {
		case 'undefined':
		case 'function':
		case 'unknown': return;
		case 'boolean': return object.toString();
		}
		if (object === null) return 'null';
		if (object.toJSON) return object.toJSON();
		if (object.ownerDocument === document) return;
		var results = [];
		for (var property in object) {
		var value = Object.toJSON(object[property]);
		if (value !== undefined)
		results.push(property.toJSON() + ':' + value);
		}
		return '{' + results.join(',') + '}';
		},
		
		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() {
		return this.toPaddedString(2, 16);
		},
		
		succ: function() {
		return this + 1;
		},
		
		times: function(iterator) {
		$R(0, this, true).each(iterator);
		return this;
		},
		
		toPaddedString: function(length, radix) {
		var string = this.toString(radix || 10);
		return '0'.times(length - string.length) + string;
		},
		
		toJSON: function() {
		return isFinite(this) ? this.toString() : 'null';
		}
		});
		
		Date.prototype.toJSON = function() {
		return '"' + this.getFullYear() + '-' +
		(this.getMonth() + 1).toPaddedString(2) + '-' +
		this.getDate().toPaddedString(2) + 'T' +
		this.getHours().toPaddedString(2) + ':' +
		this.getMinutes().toPaddedString(2) + ':' +
		this.getSeconds().toPaddedString(2) + '"';
		};
		
		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, {
							       interpret: function(value) {
							       return value == null ? '' : String(value);
							       },
							       specialChar: {
							       '\b': '\\b',
							       '\t': '\\t',
							       '\n': '\\n',
							       '\f': '\\f',
							       '\r': '\\r',
							       '\\': '\\\\'
							       }
							       });
							       
							       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 += String.interpret(replacement(match));
			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 self = arguments.callee;
					self.text.data = this;
					return self.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('');
					},
					
					succ: function() {
					return this.slice(0, this.length - 1) +
					String.fromCharCode(this.charCodeAt(this.length - 1) + 1);
					},
					
					times: function(count) {
					var result = '';
					for (var i = 0; i < count; i++) result += this;
							    return result;
							    },
							    
							    camelize: function() {
							    var parts = this.split('-'), len = parts.length;
							    if (len == 1) return parts[0];
							    
							    var camelized = this.charAt(0) == '-'
							    ? parts[0].charAt(0).toUpperCase() + parts[0].substring(1)
							    : parts[0];
							    
							    for (var i = 1; i < len; i++)
										camelized += parts[i].charAt(0).toUpperCase() + parts[i].substring(1);
										
										return camelized;
										},
										
										capitalize: function() {
										return this.charAt(0).toUpperCase() + this.substring(1).toLowerCase();
										},
										
										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.gsub(/[\x00-\x1f\\]/, function(match) {
										var character = String.specialChar[match[0]];
										return character ? character : '\\u00' + match[0].charCodeAt().toPaddedString(2, 16);
										});
										if (useDoubleQuotes) return '"' + escapedString.replace(/"/g, '\\"') + '"';
										return "'" + escapedString.replace(/'/g, '\\\'') + "'";
										},
										
										toJSON: function() {
										return this.inspect(true);
										},
										
										evalJSON: function(sanitize) {
										try {
										if (!sanitize || (/^("(\\.|[^"\\\n\r])*?"|[,:{}\[\]0-9.\-+Eaeflnr-u \n\r\t])+?$/.test(this)))
										return eval('(' + this + ')');
										} catch (e) {}
										throw new SyntaxError('Badly formated JSON string: ' + this.inspect());
										},
										
										include: function(pattern) {
										return this.indexOf(pattern) > -1;
								    },
								    
								    startsWith: function(pattern) {
								    return this.indexOf(pattern) == 0;
								    },
								    
								    endsWith: function(pattern) {
								    return this.lastIndexOf(pattern) == (this.length - pattern.length);
								    },
								    
								    empty: function() {
								    return this == '';
								    },
								    
								    blank: function() {
								    return /^\s*$/.test(this);
								    }
								    });
								    
								    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;
								    
								    Object.extend(String.prototype.escapeHTML, {
								    div:  document.createElement('div'),
								    text: document.createTextNode('')
								    });
								    
								    with (String.prototype.escapeHTML) div.appendChild(text);
								    
								    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 + String.interpret(object[match[3]]);
								    });
								    }
								    }
								    
								    var $break    = new Object();
								    var $continue = new Object();
								    
								    var Enumerable = {
								    each: function(iterator) {
								    var index = 0;
								    try {
								    this._each(function(value) {
								    iterator(value, index++);
								    });
								    } 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.map(iterator);
										},
										
										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 || Prototype.K)(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 === undefined ? null : fillWith;
										return this.eachSlice(number, function(slice) {
										while(slice.length < number) slice.push(fillWith);
										return slice;
										});
										},
										
										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.map(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.map(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.map();
										},
										
										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));
										});
										},
										
										size: function() {
										return this.toArray().length;
										},
										
										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;
										}
										}
										
										if (Prototype.Browser.WebKit) {
										$A = Array.from = function(iterable) {
										if (!iterable) return [];
										if (!(typeof iterable == 'function' && iterable == '[object NodeList]') &&
										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 != 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(sorted) {
										return this.inject([], function(array, value, index) {
										if (0 == index || (sorted ? array.last() != value : !array.include(value)))
										array.push(value);
										return array;
										});
										},
										
										clone: function() {
										return [].concat(this);
										},
										
										size: function() {
										return this.length;
										},
										
										inspect: function() {
										return '[' + this.map(Object.inspect).join(', ') + ']';
										},
										
										toJSON: function() {
										var results = [];
										this.each(function(object) {
										var value = Object.toJSON(object);
										if (value !== undefined) results.push(value);
										});
										return '[' + results.join(',') + ']';
										}
										});
										
										Array.prototype.toArray = Array.prototype.clone;
										
										function $w(string) {
										string = string.strip();
										return string ? string.split(/\s+/) : [];
										}
										
										if (Prototype.Browser.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 = function(object) {
										if (object instanceof Hash) this.merge(object);
										else Object.extend(this, object || {});
										};
										
										Object.extend(Hash, {
										toQueryString: function(obj) {
										var parts = [];
										parts.add = arguments.callee.addPair;
										
										this.prototype._each.call(obj, function(pair) {
										if (!pair.key) return;
										var value = pair.value;
										
										if (value && typeof value == 'object') {
										if (value.constructor == Array) value.each(function(value) {
										parts.add(pair.key, value);
										});
										return;
										}
										parts.add(pair.key, value);
										});
										
										return parts.join('&');
										},
										
										toJSON: function(object) {
										var results = [];
										this.prototype._each.call(object, function(pair) {
										var value = Object.toJSON(pair.value);
										if (value !== undefined) results.push(pair.key.toJSON() + ':' + value);
										});
										return '{' + results.join(',') + '}';
										}
										});
										
										Hash.toQueryString.addPair = function(key, value, prefix) {
										if (value == null) return;
										key = encodeURIComponent(key);
										this.push(key + '=' + (value == null ? '' : encodeURIComponent(value)));
										}
										
										Object.extend(Hash.prototype, Enumerable);
										Object.extend(Hash.prototype, {
										_each: function(iterator) {
										for (var key in this) {
										var value = this[key];
										if (value && value == Hash.prototype[key]) 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;
										});
										},
										
										remove: function() {
										var result;
										for(var i = 0, length = arguments.length; i < length; i++) {
										var value = this[arguments[i]];
										if (value !== undefined){
										if (result === undefined) result = value;
										else {
										if (result.constructor != Array) result = [result];
										result.push(value)
										}
										}
										delete this[arguments[i]];
										}
										return result;
										},
										
										toQueryString: function() {
										return Hash.toQueryString(this);
										},
										
										inspect: function() {
										return '#<Hash:{' + this.map(function(pair) {
										return pair.map(Object.inspect).join(': ');
										}).join(', ') + '}>';
										},
										
										toJSON: function() {
										return Hash.toJSON(this);
										}
										});
										
										function $H(object) {
										if (object instanceof Hash) return object;
										return new Hash(object);
										};
										
										// Safari iterates over shadowed properties
										if (function() {
										var i = 0, Test = function(value) { this.key = value };
										Test.prototype.key = 'foo';
										for (var property in new Test('bar')) i++;
										return i > 1;
										}()) Hash.prototype._each = function(iterator) {
										var cache = [];
										for (var key in this) {
										var value = this[key];
										if ((value && value == Hash.prototype[key]) || cache.include(key)) continue;
										cache.push(key);
										var pair = [key, value];
										pair.key = key;
										pair.value = value;
										iterator(pair);
										}
										};
										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();
										if (typeof this.options.parameters == 'string')
										this.options.parameters = this.options.parameters.toQueryParams();
										}
										}
										
										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) {
										this.url = url;
										this.method = this.options.method;
										var params = Object.clone(this.options.parameters);
										
										if (!['get', 'post'].include(this.method)) {
										// simulate other verbs over post
										params['_method'] = this.method;
										this.method = 'post';
										}
										
										this.parameters = params;
										
										if (params = Hash.toQueryString(params)) {
										// when GET, append parameters to URL
										if (this.method == 'get')
										this.url += (this.url.include('?') ? '&' : '?') + params;
										else if (/Konqueror|Safari|KHTML/.test(navigator.userAgent))
										params += '&_=';
										}
										
										try {
										Ajax.Responders.dispatch('onCreate', this, this.transport);
										
										this.transport.open(this.method.toUpperCase(), this.url,
										this.options.asynchronous);
										
										if (this.options.asynchronous)
										setTimeout(function() { this.respondToReadyState(1) }.bind(this), 10);
										
										this.transport.onreadystatechange = this.onStateChange.bind(this);
										this.setRequestHeaders();
										
										this.body = this.method == 'post' ? (this.options.postBody || params) : null;
										this.transport.send(this.body);
										
										/* Force Firefox to handle ready state 4 for synchronous requests */
										if (!this.options.asynchronous && this.transport.overrideMimeType)
										this.onStateChange();
										
										}
										catch (e) {
										this.dispatchException(e);
										}
										},
										
										onStateChange: function() {
										var readyState = this.transport.readyState;
										if (readyState > 1 && !((readyState == 4) && this._complete))
										this.respondToReadyState(this.transport.readyState);
										},
										
										setRequestHeaders: function() {
										var headers = {
										'X-Requested-With': 'XMLHttpRequest',
										'X-Prototype-Version': Prototype.Version,
										'Accept': 'text/javascript, text/html, application/xml, text/xml, */*'
										};
										
										if (this.method == 'post') {
										headers['Content-type'] = this.options.contentType +
										(this.options.encoding ? '; charset=' + this.options.encoding : '');
										
										/* Force "Connection: close" for older Mozilla browsers to work
										* around a bug where XMLHttpRequest sends an incorrect
										* Content-length header. See Mozilla Bugzilla #246651.
										*/
										if (this.transport.overrideMimeType &&
										(navigator.userAgent.match(/Gecko\/(\d{4})/) || [0,2005])[1] < 2005)
										headers['Connection'] = 'close';
										}
										
										// 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);
										}
										
										if ((this.getHeader('Content-type') || 'text/javascript').strip().
										match(/^(text|application)\/(x-)?(java|ecma)script(;.*)?$/i))
										this.evalResponse();
										}
										
										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') {
										// 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) {
										var q = ".//*[contains(concat(' ', @class, ' '), ' " + className + " ')]";
										return document._getElementsByXPath(q, parentElement);
										}
										
										} else document.getElementsByClassName = function(className, parentElement) {
										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 = {};
										
										Element.extend = function(element) {
										var F = Prototype.BrowserFeatures;
										if (!element || !element.tagName || element.nodeType == 3 ||
										element._extended || F.SpecificElementExtensions || element == window)
										return element;
										
										var methods = {}, tagName = element.tagName, cache = Element.extend.cache,
										T = Element.Methods.ByTag;
										
										// extend methods for all tags (Safari doesn't need this)
										if (!F.ElementExtensions) {
										Object.extend(methods, Element.Methods),
										Object.extend(methods, Element.Methods.Simulated);
										}
										
										// extend methods for specific tags
										if (T[tagName]) Object.extend(methods, T[tagName]);
										
										for (var property in methods) {
										var value = methods[property];
										if (typeof value == 'function' && !(property in element))
										element[property] = cache.findOrStore(value);
										}
										
										element._extended = Prototype.emptyFunction;
										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);
										html = typeof html == 'undefined' ? '' : html.toString();
										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) {
										return $A($(element).getElementsByTagName('*')).each(Element.extend);
										},
										
										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) {
										if (typeof selector == 'string')
										selector = new Selector(selector);
										return selector.match($(element));
										},
										
										up: function(element, expression, index) {
										var ancestors = $(element).ancestors();
										return expression ? Selector.findElement(ancestors, expression, index) :
										ancestors[index || 0];
										},
										
										down: function(element, expression, index) {
										var descendants = $(element).descendants();
										return expression ? Selector.findElement(descendants, expression, index) :
										descendants[index || 0];
										},
										
										previous: function(element, expression, index) {
										var previousSiblings = $(element).previousSiblings();
										return expression ? Selector.findElement(previousSiblings, expression, index) :
										previousSiblings[index || 0];
										},
										
										next: function(element, expression, index) {
										var nextSiblings = $(element).nextSiblings();
										return expression ? Selector.findElement(nextSiblings, expression, index) :
										nextSiblings[index || 0];
										},
										
										getElementsBySelector: function() {
										var args = $A(arguments), element = $(args.shift());
										return Selector.findChildElements(element, args);
										},
										
										getElementsByClassName: function(element, className) {
										return document.getElementsByClassName(className, element);
										},
										
										readAttribute: function(element, name) {
										element = $(element);
										if (Prototype.Browser.IE) {
										if (!element.attributes) return null;
										var t = Element._attributeTranslations;
										if (t.values[name]) return t.values[name](element, name);
										if (t.names[name])  name = t.names[name];
										var attribute = element.attributes[name];
										return attribute ? attribute.nodeValue : null;
										}
										return element.getAttribute(name);
										},
										
										getHeight: function(element) {
										return $(element).getDimensions().height;
										},
										
										getWidth: function(element) {
										return $(element).getDimensions().width;
										},
										
										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;
										},
										
										toggleClassName: function(element, className) {
										if (!(element = $(element))) return;
										Element.classNames(element)[element.hasClassName(className) ? 'remove' : 'add'](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.blank();
										},
										
										descendantOf: function(element, ancestor) {
										element = $(element), ancestor = $(ancestor);
										while (element = element.parentNode)
										if (element == ancestor) return true;
										return false;
										},
										
										scrollTo: function(element) {
										element = $(element);
										var pos = Position.cumulativeOffset(element);
										window.scrollTo(pos[0], pos[1]);
										return element;
										},
										
										getStyle: function(element, style) {
										element = $(element);
										style = style == 'float' ? 'cssFloat' : style.camelize();
										var value = element.style[style];
										if (!value) {
										var css = document.defaultView.getComputedStyle(element, null);
										value = css ? css[style] : null;
										}
										if (style == 'opacity') return value ? parseFloat(value) : 1.0;
										return value == 'auto' ? null : value;
										},
										
										getOpacity: function(element) {
										return $(element).getStyle('opacity');
										},
										
										setStyle: function(element, styles, camelized) {
										element = $(element);
										var elementStyle = element.style;
										
										for (var property in styles)
										if (property == 'opacity') element.setOpacity(styles[property])
										else
										elementStyle[(property == 'float' || property == 'cssFloat') ?
										(elementStyle.styleFloat === undefined ? 'cssFloat' : 'styleFloat') :
										(camelized ? property : property.camelize())] = styles[property];
										
										return element;
										},
										
										setOpacity: function(element, value) {
										element = $(element);
										element.style.opacity = (value == 1 || value === '') ? '' :
										(value < 0.00001) ? 0 : value;
										return element;
										},
										
										getDimensions: function(element) {
										element = $(element);
										var display = $(element).getStyle('display');
										if (display != 'none' && display != null) // Safari bug
										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;
										var originalDisplay = els.display;
										els.visibility = 'hidden';
										els.position = 'absolute';
										els.display = 'block';
										var originalWidth = element.clientWidth;
										var originalHeight = element.clientHeight;
										els.display = originalDisplay;
										els.position = originalPosition;
										els.visibility = originalVisibility;
										return {width: originalWidth, height: originalHeight};
										},
										
										makePositioned: function(element) {
										element = $(element);
										var pos = Element.getStyle(element, 'position');
										if (pos == 'static' || !pos) {
										element._madePositioned = true;
										element.style.position = 'relative';
										// 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;
										}
										};
										
										Object.extend(Element.Methods, {childOf: Element.Methods.descendantOf});
										
										if (Prototype.Browser.Opera) {
										Element.Methods._getStyle = Element.Methods.getStyle;
										Element.Methods.getStyle = function(element, style) {
										switch(style) {
										case 'left':
										case 'top':
										case 'right':
										case 'bottom':
										if (Element._getStyle(element, 'position') == 'static') return null;
										default: return Element._getStyle(element, style);
										}
										};
										}
										else if (Prototype.Browser.IE) {
										Element.Methods.getStyle = function(element, style) {
										element = $(element);
										style = (style == 'float' || style == 'cssFloat') ? 'styleFloat' : style.camelize();
										var value = element.style[style];
										if (!value && element.currentStyle) value = element.currentStyle[style];
										
										if (style == 'opacity') {
										if (value = (element.getStyle('filter') || '').match(/alpha\(opacity=(.*)\)/))
										if (value[1]) return parseFloat(value[1]) / 100;
										return 1.0;
										}
										
										if (value == 'auto') {
										if ((style == 'width' || style == 'height') && (element.getStyle('display') != 'none'))
										return element['offset'+style.capitalize()] + 'px';
										return null;
										}
										return value;
										};
										
										Element.Methods.setOpacity = function(element, value) {
										element = $(element);
										var filter = element.getStyle('filter'), style = element.style;
										if (value == 1 || value === '') {
										style.filter = filter.replace(/alpha\([^\)]*\)/gi,'');
										return element;
										} else if (value < 0.00001) value = 0;
										style.filter = filter.replace(/alpha\([^\)]*\)/gi, '') +
										'alpha(opacity=' + (value * 100) + ')';
										return element;
										};
										
										// IE is missing .innerHTML support for TABLE-related elements
										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 = '<table><tbody>' +  html.stripScripts() + '</tbody></table>';
										depth = 2;
										break;
										case 'TR':
										div.innerHTML = '<table><tbody><tr>' +  html.stripScripts() + '</tr></tbody></table>';
										depth = 3;
										break;
										case 'TD':
										div.innerHTML = '<table><tbody><tr><td>' +  html.stripScripts() + '</td></tr></tbody></table>';
										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;
										}
										}
										else if (Prototype.Browser.Gecko) {
										Element.Methods.setOpacity = function(element, value) {
										element = $(element);
										element.style.opacity = (value == 1) ? 0.999999 :
										(value === '') ? '' : (value < 0.00001) ? 0 : value;
										return element;
										};
										}
										
										Element._attributeTranslations = {
										names: {
										colspan:   "colSpan",
										rowspan:   "rowSpan",
										valign:    "vAlign",
										datetime:  "dateTime",
										accesskey: "accessKey",
										tabindex:  "tabIndex",
										enctype:   "encType",
										maxlength: "maxLength",
										readonly:  "readOnly",
										longdesc:  "longDesc"
										},
										values: {
										_getAttr: function(element, attribute) {
										return element.getAttribute(attribute, 2);
										},
										_flag: function(element, attribute) {
										return $(element).hasAttribute(attribute) ? attribute : null;
										},
										style: function(element) {
										return element.style.cssText.toLowerCase();
										},
										title: function(element) {
										var node = element.getAttributeNode('title');
										return node.specified ? node.nodeValue : null;
										}
										}
										};
										
										(function() {
										Object.extend(this, {
										href: this._getAttr,
										src:  this._getAttr,
										disabled: this._flag,
										checked:  this._flag,
										readonly: this._flag,
										multiple: this._flag
										});
										}).call(Element._attributeTranslations.values);
										
										Element.Methods.Simulated = {
										hasAttribute: function(element, attribute) {
										var t = Element._attributeTranslations, node;
										attribute = t.names[attribute] || attribute;
										node = $(element).getAttributeNode(attribute);
										return node && node.specified;
										}
										};
										
										Element.Methods.ByTag = {};
										
										Object.extend(Element, Element.Methods);
										
										if (!Prototype.BrowserFeatures.ElementExtensions &&
										document.createElement('div').__proto__) {
										window.HTMLElement = {};
										window.HTMLElement.prototype = document.createElement('div').__proto__;
										Prototype.BrowserFeatures.ElementExtensions = true;
										}
										
										Element.hasAttribute = function(element, attribute) {
										if (element.hasAttribute) return element.hasAttribute(attribute);
										return Element.Methods.Simulated.hasAttribute(element, attribute);
										};
										
										Element.addMethods = function(methods) {
										var F = Prototype.BrowserFeatures, T = Element.Methods.ByTag;
										if (arguments.length == 2) {
										var tagName = methods;
										methods = arguments[1];
										}
										
										if (!tagName) Object.extend(Element.Methods, methods || {});
										else {
										if (tagName.constructor == Array) tagName.each(extend);
										else extend(tagName);
										}
										
										function extend(tagName) {
										tagName = tagName.toUpperCase();
										if (!Element.Methods.ByTag[tagName])
										Element.Methods.ByTag[tagName] = {};
										Object.extend(Element.Methods.ByTag[tagName], methods);
										}
										
										function copy(methods, destination, onlyIfAbsent) {
										onlyIfAbsent = onlyIfAbsent || false;
										var cache = Element.extend.cache;
										for (var property in methods) {
										var value = methods[property];
										if (!onlyIfAbsent || !(property in destination))
										destination[property] = cache.findOrStore(value);
										}
										}
										
										function findDOMClass(tagName) {
										var klass;
										var trans = {
										"OPTGROUP": "OptGroup", "TEXTAREA": "TextArea", "P": "Paragraph",
										"FIELDSET": "FieldSet", "UL": "UList", "OL": "OList", "DL": "DList",
										"DIR": "Directory", "H1": "Heading", "H2": "Heading", "H3": "Heading",
										"H4": "Heading", "H5": "Heading", "H6": "Heading", "Q": "Quote",
										"INS": "Mod", "DEL": "Mod", "A": "Anchor", "IMG": "Image", "CAPTION":
										"TableCaption", "COL": "TableCol", "COLGROUP": "TableCol", "THEAD":
										"TableSection", "TFOOT": "TableSection", "TBODY": "TableSection", "TR":
										"TableRow", "TH": "TableCell", "TD": "TableCell", "FRAMESET":
										"FrameSet", "IFRAME": "IFrame"
										};
										if (trans[tagName]) klass = 'HTML' + trans[tagName] + 'Element';
										if (window[klass]) return window[klass];
										klass = 'HTML' + tagName + 'Element';
										if (window[klass]) return window[klass];
										klass = 'HTML' + tagName.capitalize() + 'Element';
										if (window[klass]) return window[klass];
										
										window[klass] = {};
										window[klass].prototype = document.createElement(tagName).__proto__;
										return window[klass];
										}
										
										if (F.ElementExtensions) {
										copy(Element.Methods, HTMLElement.prototype);
										copy(Element.Methods.Simulated, HTMLElement.prototype, true);
										}
										
										if (F.SpecificElementExtensions) {
										for (var tag in Element.Methods.ByTag) {
										var klass = findDOMClass(tag);
										if (typeof klass == "undefined") continue;
										copy(T[tag], klass.prototype);
										}
										}
										};
										
										var 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 = '<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($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.expression = expression.strip();
										this.compileMatcher();
										},
										
										compileMatcher: function() {
										// Selectors with namespaced attributes can't use the XPath version
										if (Prototype.BrowserFeatures.XPath && !(/\[[\w-]*?:/).test(this.expression))
										return this.compileXPathMatcher();
										
										var e = this.expression, ps = Selector.patterns, h = Selector.handlers,
										c = Selector.criteria, le, p, m;
										
										if (Selector._cache[e]) {
										this.matcher = Selector._cache[e]; return;
										}
										this.matcher = ["this.matcher = function(root) {",
										"var r = root, h = Selector.handlers, c = false, n;"];
										
										while (e && le != e && (/\S/).test(e)) {
										le = e;
										for (var i in ps) {
										p = ps[i];
										if (m = e.match(p)) {
										this.matcher.push(typeof c[i] == 'function' ? c[i](m) :
										new Template(c[i]).evaluate(m));
										e = e.replace(m[0], '');
										break;
										}
										}
										}
										
										this.matcher.push("return h.unique(n);\n}");
										eval(this.matcher.join('\n'));
										Selector._cache[this.expression] = this.matcher;
										},
										
										compileXPathMatcher: function() {
										var e = this.expression, ps = Selector.patterns,
										x = Selector.xpath, le, p, m;
										
										if (Selector._cache[e]) {
										this.xpath = Selector._cache[e]; return;
										}
										
										this.matcher = ['.//*'];
										while (e && le != e && (/\S/).test(e)) {
										le = e;
										for (var i in ps) {
										if (m = e.match(ps[i])) {
										this.matcher.push(typeof x[i] == 'function' ? x[i](m) :
										new Template(x[i]).evaluate(m));
										e = e.replace(m[0], '');
										break;
										}
										}
										}
										
										this.xpath = this.matcher.join('');
										Selector._cache[this.expression] = this.xpath;
										},
										
										findElements: function(root) {
										root = root || document;
										if (this.xpath) return document._getElementsByXPath(this.xpath, root);
										return this.matcher(root);
										},
										
										match: function(element) {
										return this.findElements(document).include(element);
										},
										
										toString: function() {
										return this.expression;
										},
										
										inspect: function() {
										return "#<Selector:" + this.expression.inspect() + ">";
										}
										};
										
										Object.extend(Selector, {
										_cache: {},
										
										xpath: {
										descendant:   "//*",
										child:        "/*",
										adjacent:     "/following-sibling::*[1]",
										laterSibling: '/following-sibling::*',
										tagName:      function(m) {
										if (m[1] == '*') return '';
										return "[local-name()='" + m[1].toLowerCase() +
										"' or local-name()='" + m[1].toUpperCase() + "']";
										},
										className:    "[contains(concat(' ', @class, ' '), ' #{1} ')]",
										id:           "[@id='#{1}']",
										attrPresence: "[@#{1}]",
										attr: function(m) {
										m[3] = m[5] || m[6];
										return new Template(Selector.xpath.operators[m[2]]).evaluate(m);
										},
										pseudo: function(m) {
										var h = Selector.xpath.pseudos[m[1]];
										if (!h) return '';
										if (typeof h === 'function') return h(m);
										return new Template(Selector.xpath.pseudos[m[1]]).evaluate(m);
										},
										operators: {
										'=':  "[@#{1}='#{3}']",
										'!=': "[@#{1}!='#{3}']",
										'^=': "[starts-with(@#{1}, '#{3}')]",
										'$=': "[substring(@#{1}, (string-length(@#{1}) - string-length('#{3}') + 1))='#{3}']",
										'*=': "[contains(@#{1}, '#{3}')]",
										'~=': "[contains(concat(' ', @#{1}, ' '), ' #{3} ')]",
										'|=': "[contains(concat('-', @#{1}, '-'), '-#{3}-')]"
										},
										pseudos: {
										'first-child': '[not(preceding-sibling::*)]',
										'last-child':  '[not(following-sibling::*)]',
										'only-child':  '[not(preceding-sibling::* or following-sibling::*)]',
										'empty':       "[count(*) = 0 and (count(text()) = 0 or translate(text(), ' \t\r\n', '') = '')]",
										'checked':     "[@checked]",
										'disabled':    "[@disabled]",
										'enabled':     "[not(@disabled)]",
										'not': function(m) {
										if (!m[6]) return '';
										var p = Selector.patterns, x = Selector.xpath;
										for (var i in p) {
										if (mm = m[6].match(p[i])) {
										var ss = typeof x[i] == 'function' ? x[i](mm) : new Template(x[i]).evaluate(mm);
										m[6] = ss.substring(1, ss.length - 1);
										break;
										}
										}
										return "[not(" + m[6] + ")]";
										},
										'nth-child':      function(m) {
										return Selector.xpath.pseudos.nth("(count(./preceding-sibling::*) + 1) ", m);
										},
										'nth-last-child': function(m) {
										return Selector.xpath.pseudos.nth("(count(./following-sibling::*) + 1) ", m);
										},
										'nth-of-type':    function(m) {
										return Selector.xpath.pseudos.nth("position() ", m);
										},
										'nth-last-of-type': function(m) {
										return Selector.xpath.pseudos.nth("(last() + 1 - position()) ", m);
										},
										'first-of-type':  function(m) {
										m[6] = "1"; return Selector.xpath.pseudos['nth-of-type'](m);
										},
										'last-of-type':   function(m) {
										m[6] = "1"; return Selector.xpath.pseudos['nth-last-of-type'](m);
										},
										'only-of-type':   function(m) {
										var p = Selector.xpath.pseudos; return p['first-of-type'](m) + p['last-of-type'](m);
										},
										nth: function(predicate, m) {
										var mm, formula = m[6];
										if (formula == 'even') formula = '2n+0';
										if (formula == 'odd')  formula = '2n+1';
										if (mm = formula.match(/^(\d+)$/)) // digit only
										predicate += "= " + mm[1];
										if (mm = formula.match(/^(\d+)?n(\+(\d+))?/)) { // an+b
										var a = mm[1] ? Number(mm[1]) : 1;
										var b = mm[3] ? Number(mm[3]) : 0;
										predicate += "mod " + a + " = " + b;
										}
										return "[" + predicate + "]";
										}
										}
										},
										
										criteria: {
										tagName:      'n = h.tagName(n, r, "#{1}", c);   c = false;',
										className:    'n = h.className(n, r, "#{1}", c); c = false;',
										id:           'n = h.id(n, r, "#{1}", c);        c = false;',
										attrPresence: 'n = h.attrPresence(n, r, "#{1}"); c = false;',
										attr: function(m) {
										m[3] = m[5] || m[6];
										return new Template('n = h.attr(n, r, "#{1}", "#{3}", "#{2}"); c = false;').evaluate(m);
										},
										pseudo:       'n = h.pseudo(n, "#{1}", "#{6}", r, c); c = false;',
										descendant:   'c = "descendant";',
										child:        'c = "child";',
										adjacent:     'c = "adjacent";',
										laterSibling: 'c = "laterSibling";'
										},
										
										patterns: {
										// combinators must be listed first
										// (and descendant needs to be last combinator)
										laterSibling: /^\s*~\s*/,
										child:        /^\s*>\s*/,
										adjacent:     /^\s*\+\s*/,
										descendant:   /^\s/,
										
										// selectors follow
										tagName:      /^\s*(\*|[\w\-]+)(\b|$)?/,
										id:           /^#([\w\-\*]+)(\b|$)/,
										className:    /^\.([\w\-\*]+)(\b|$)/,
										pseudo:       /^:((first|last|nth|nth-last|only)(-child|-of-type)|empty|checked|(en|dis)abled|not)(\((.*?)\))?(\b|$)/,
										attrPresence: /^\[([\w]+)\]/,
										attr:         /\[((?:[\w-]*:)?[\w-]+)\s*(?:([!^$*~|]?=)\s*((['"])([^\]]*?)\4|([^'"][^\]]*?)))?\]/
										},
										
										handlers: {
										// UTILITY FUNCTIONS
										// joins two collections
										concat: function(a, b) {
										for (var i = 0, node; node = b[i]; i++)
										a.push(node);
										return a;
										},
										
										// marks an array of nodes for counting
										mark: function(nodes) {
										for (var i = 0, node; node = nodes[i]; i++)
										node._counted = true;
										return nodes;
										},
										
										unmark: function(nodes) {
										for (var i = 0, node; node = nodes[i]; i++)
										node._counted = undefined;
										return nodes;
										},
										
										// mark each child node with its position (for nth calls)
										// "ofType" flag indicates whether we're indexing for nth-of-type
										// rather than nth-child
										index: function(parentNode, reverse, ofType) {
										parentNode._counted = true;
										if (reverse) {
										for (var nodes = parentNode.childNodes, i = nodes.length - 1, j = 1; i >= 0; i--) {
										node = nodes[i];
										if (node.nodeType == 1 && (!ofType || node._counted)) node.nodeIndex = j++;
										}
										} else {
										for (var i = 0, j = 1, nodes = parentNode.childNodes; node = nodes[i]; i++)
										if (node.nodeType == 1 && (!ofType || node._counted)) node.nodeIndex = j++;
										}
										},
										
										// filters out duplicates and extends all nodes
										unique: function(nodes) {
										if (nodes.length == 0) return nodes;
										var results = [], n;
										for (var i = 0, l = nodes.length; i < l; i++)
										if (!(n = nodes[i])._counted) {
										n._counted = true;
										results.push(Element.extend(n));
										}
										return Selector.handlers.unmark(results);
										},
										
										// COMBINATOR FUNCTIONS
										descendant: function(nodes) {
										var h = Selector.handlers;
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										h.concat(results, Element.descendants(node));
										return results;
										},
										
										child: function(nodes) {
										var h = Selector.handlers;
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										h.concat(results, Element.immediateDescendants(node));
										return results;
										},
										
										adjacent: function(nodes) {
										for (var i = 0, results = [], node; node = nodes[i]; i++) {
										var next = this.nextElementSibling(node);
										if (next) results.push(next);
										}
										return results;
										},
										
										laterSibling: function(nodes) {
										var h = Selector.handlers;
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										h.concat(results, Element.nextSiblings(node));
										return results;
										},
										
										nextElementSibling: function(node) {
										while (node = node.nextSibling)
										if (node.nodeType == 1) return node;
										return null;
										},
										
										previousElementSibling: function(node) {
										while (node = node.previousSibling)
										if (node.nodeType == 1) return node;
										return null;
										},
										
										// TOKEN FUNCTIONS
										tagName: function(nodes, root, tagName, combinator) {
										tagName = tagName.toUpperCase();
										var results = [], h = Selector.handlers;
										if (nodes) {
										if (combinator) {
										// fastlane for ordinary descendant combinators
										if (combinator == "descendant") {
										for (var i = 0, node; node = nodes[i]; i++)
										h.concat(results, node.getElementsByTagName(tagName));
										return results;
										} else nodes = this[combinator](nodes);
										if (tagName == "*") return nodes;
										}
										for (var i = 0, node; node = nodes[i]; i++)
										if (node.tagName.toUpperCase() == tagName) results.push(node);
										return results;
										} else return root.getElementsByTagName(tagName);
										},
										
										id: function(nodes, root, id, combinator) {
										var targetNode = $(id), h = Selector.handlers;
										if (!nodes && root == document) return targetNode ? [targetNode] : [];
										if (nodes) {
										if (combinator) {
										if (combinator == 'child') {
										for (var i = 0, node; node = nodes[i]; i++)
										if (targetNode.parentNode == node) return [targetNode];
										} else if (combinator == 'descendant') {
										for (var i = 0, node; node = nodes[i]; i++)
										if (Element.descendantOf(targetNode, node)) return [targetNode];
										} else if (combinator == 'adjacent') {
										for (var i = 0, node; node = nodes[i]; i++)
										if (Selector.handlers.previousElementSibling(targetNode) == node)
										return [targetNode];
										} else nodes = h[combinator](nodes);
										}
										for (var i = 0, node; node = nodes[i]; i++)
										if (node == targetNode) return [targetNode];
										return [];
										}
										return (targetNode && Element.descendantOf(targetNode, root)) ? [targetNode] : [];
										},
										
										className: function(nodes, root, className, combinator) {
										if (nodes && combinator) nodes = this[combinator](nodes);
										return Selector.handlers.byClassName(nodes, root, className);
										},
										
										byClassName: function(nodes, root, className) {
										if (!nodes) nodes = Selector.handlers.descendant([root]);
										var needle = ' ' + className + ' ';
										for (var i = 0, results = [], node, nodeClassName; node = nodes[i]; i++) {
										nodeClassName = node.className;
										if (nodeClassName.length == 0) continue;
										if (nodeClassName == className || (' ' + nodeClassName + ' ').include(needle))
										results.push(node);
										}
										return results;
										},
										
										attrPresence: function(nodes, root, attr) {
										var results = [];
										for (var i = 0, node; node = nodes[i]; i++)
										if (Element.hasAttribute(node, attr)) results.push(node);
										return results;
										},
										
										attr: function(nodes, root, attr, value, operator) {
										var handler = Selector.operators[operator], results = [];
										for (var i = 0, node; node = nodes[i]; i++) {
										var nodeValue = Element.readAttribute(node, attr);
										if (nodeValue === null) continue;
										if (handler(nodeValue, value)) results.push(node);
										}
										return results;
										},
										
										pseudo: function(nodes, name, value, root, combinator) {
										if (combinator) nodes = this[combinator](nodes);
										return Selector.pseudos[name](nodes, value, root);
										}
										},
										
										pseudos: {
										'first-child': function(nodes, value, root) {
										for (var i = 0, results = [], node; node = nodes[i]; i++) {
										if (Selector.handlers.previousElementSibling(node)) continue;
										results.push(node);
										}
										return results;
										},
										'last-child': function(nodes, value, root) {
										for (var i = 0, results = [], node; node = nodes[i]; i++) {
										if (Selector.handlers.nextElementSibling(node)) continue;
										results.push(node);
										}
										return results;
										},
										'only-child': function(nodes, value, root) {
										var h = Selector.handlers;
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										if (!h.previousElementSibling(node) && !h.nextElementSibling(node))
										results.push(node);
										return results;
										},
										'nth-child':        function(nodes, formula, root) {
										return Selector.pseudos.nth(nodes, formula, root);
										},
										'nth-last-child':   function(nodes, formula, root) {
										return Selector.pseudos.nth(nodes, formula, root, true);
										},
										'nth-of-type':      function(nodes, formula, root) {
										return Selector.pseudos.nth(nodes, formula, root, false, true);
										},
										'nth-last-of-type': function(nodes, formula, root) {
										return Selector.pseudos.nth(nodes, formula, root, true, true);
										},
										'first-of-type':    function(nodes, formula, root) {
										return Selector.pseudos.nth(nodes, "1", root, false, true);
										},
										'last-of-type':     function(nodes, formula, root) {
										return Selector.pseudos.nth(nodes, "1", root, true, true);
										},
										'only-of-type':     function(nodes, formula, root) {
										var p = Selector.pseudos;
										return p['last-of-type'](p['first-of-type'](nodes, formula, root), formula, root);
										},
										
										// handles nth(-last)-child, nth(-last)-of-type, and (first|last)-of-type
										nth: function(nodes, formula, root, reverse, ofType) {
										if (formula == 'even') formula = '2n+0';
										if (formula == 'odd')  formula = '2n+1';
										var h = Selector.handlers, results = [], indexed = [], m;
										h.mark(nodes);
										for (var i = 0, node; node = nodes[i]; i++) {
										if (!node.parentNode._counted) {
										h.index(node.parentNode, reverse, ofType);
										indexed.push(node.parentNode);
										}
										}
										if (formula.match(/^\d+$/)) { // just a number
										formula = Number(formula);
										for (var i = 0, node; node = nodes[i]; i++)
										if (node.nodeIndex == formula) results.push(node);
										} else if (m = formula.match(/^(\d+)?n(\+(\d+))?$/)) { // an+b
										var a = m[1] ? Number(m[1]) : 1;
										var b = m[3] ? Number(m[3]) : 0;
										for (var i = 0, node; node = nodes[i]; i++)
										if (node.nodeIndex % a == b) results.push(node);
										}
										h.unmark(nodes);
										h.unmark(indexed);
										return results;
										},
										
										'empty': function(nodes, value, root) {
										for (var i = 0, results = [], node; node = nodes[i]; i++) {
										// IE treats comments as element nodes
										if (node.tagName == '!' || (node.firstChild && !node.innerHTML.match(/^\s*$/))) continue;
										results.push(node);
										}
										return results;
										},
										
										'not': function(nodes, selector, root) {
										var h = Selector.handlers, exclusions = $A(nodes), selectorType, m;
										for (var i in Selector.patterns) {
										if (m = selector.match(Selector.patterns[i])) {
										selectorType = i; break;
										}
										}
										switch(selectorType) {
										case 'className': case 'tagName': case 'id': // fallthroughs
										case 'attrPresence': exclusions = h[selectorType](exclusions, root, m[1], false); break;
										case 'attr': m[3] = m[5] || m[6]; exclusions = h.attr(exclusions, root, m[1], m[3], m[2]); break;
										case 'pseudo': exclusions = h.pseudo(exclusions, m[1], m[6], root, false); break;
										// only 'simple selectors' (one token) allowed in a :not clause
										default: throw 'Illegal selector in :not clause.';
										}
										h.mark(exclusions);
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										if (!node._counted) results.push(node);
										h.unmark(exclusions);
										return results;
										},
										
										'enabled': function(nodes, value, root) {
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										if (!node.disabled) results.push(node);
										return results;
										},
										
										'disabled': function(nodes, value, root) {
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										if (node.disabled) results.push(node);
										return results;
										},
										
										'checked': function(nodes, value, root) {
										for (var i = 0, results = [], node; node = nodes[i]; i++)
										if (node.checked) results.push(node);
										return results;
										}
										},
										
										operators: {
										'=':  function(nv, v) { return nv == v; },
										'!=': function(nv, v) { return nv != v; },
										'^=': function(nv, v) { return nv.startsWith(v); },
										'$=': function(nv, v) { return nv.endsWith(v); },
										'*=': function(nv, v) { return nv.include(v); },
										'~=': function(nv, v) { return (' ' + nv + ' ').include(' ' + v + ' '); },
										'|=': function(nv, v) { return ('-' + nv.toUpperCase() + '-').include('-' + v.toUpperCase() + '-'); }
										},
										
										matchElements: function(elements, expression) {
										var matches = new Selector(expression).findElements(), h = Selector.handlers;
										h.mark(matches);
										for (var i = 0, results = [], element; element = elements[i]; i++)
										if (element._counted) results.push(element);
										h.unmark(matches);
										return results;
										},
										
										findElement: function(elements, expression, index) {
										if (typeof expression == 'number') {
										index = expression; expression = false;
										}
										return Selector.matchElements(elements, expression || '*')[index || 0];
										},
										
										findChildElements: function(element, expressions) {
										var exprs = expressions.join(','), expressions = [];
										exprs.scan(/(([\w#:.~>+()\s-]+|\*|\[.*?\])+)\s*(,|$)/, function(m) {
										expressions.push(m[1].strip());
										});
										var results = [], h = Selector.handlers;
										for (var i = 0, l = expressions.length, selector; i < l; i++) {
										selector = new Selector(expressions[i].strip());
										h.concat(results, selector.findElements(element));
										}
										return (l > 1) ? h.unique(results) : results;
										}
										});
										
										function $$() {
										return Selector.findChildElements(document, $A(arguments));
										}
										var Form = {
										reset: function(form) {
										$(form).reset();
										return form;
										},
										
										serializeElements: function(elements, getHash) {
										var data = elements.inject({}, function(result, element) {
										if (!element.disabled && element.name) {
										var key = element.name, value = $(element).getValue();
										if (value != null) {
										if (key in result) {
										if (result[key].constructor != Array) result[key] = [result[key]];
										result[key].push(value);
										}
										else result[key] = value;
										}
										}
										return result;
										});
										
										return getHash ? data : Hash.toQueryString(data);
										}
										};
										
										Form.Methods = {
										serialize: function(form, getHash) {
										return Form.serializeElements(Form.getElements(form), getHash);
										},
										
										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 $A(inputs).map(Element.extend);
										
										for (var i = 0, matchingInputs = [], length = inputs.length; i < length; i++) {
										var input = inputs[i];
										if ((typeName && input.type != typeName) || (name && input.name != name))
										continue;
										matchingInputs.push(Element.extend(input));
										}
										
										return matchingInputs;
										},
										
										disable: function(form) {
										form = $(form);
										form.getElements().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;
										},
										
										request: function(form, options) {
										form = $(form), options = Object.clone(options || {});
										
										var params = options.parameters;
										options.parameters = form.serialize(true);
										
										if (params) {
										if (typeof params == 'string') params = params.toQueryParams();
										Object.extend(options.parameters, params);
										}
										
										if (form.hasAttribute('method') && !options.method)
										options.method = form.method;
										
										return new Ajax.Request(form.action, options);
										}
										}
										
										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 && element.name) {
										var value = element.getValue();
										if (value != undefined) {
										var pair = {};
										pair[element.name] = value;
										return Hash.toQueryString(pair);
										}
										}
										return '';
										},
										
										getValue: function(element) {
										element = $(element);
										var method = element.tagName.toLowerCase();
										return Form.Element.Serializers[method](element);
										},
										
										clear: function(element) {
										$(element).value = '';
										return element;
										},
										
										present: function(element) {
										return $(element).value != '';
										},
										
										activate: function(element) {
										element = $(element);
										try {
										element.focus();
										if (element.select && (element.tagName.toLowerCase() != 'input' ||
										!['button', 'reset', 'submit'].include(element.type)))
										element.select();
										} catch (e) {}
										return element;
										},
										
										disable: function(element) {
										element = $(element);
										element.blur();
										element.disabled = true;
										return element;
										},
										
										enable: function(element) {
										element = $(element);
										element.disabled = false;
										return element;
										}
										}
										
										Object.extend(Form.Element, Form.Element.Methods);
										Object.extend(Element.Methods.ByTag, {
										"FORM":     Object.clone(Form.Methods),
										"INPUT":    Object.clone(Form.Element.Methods),
										"SELECT":   Object.clone(Form.Element.Methods),
										"TEXTAREA": Object.clone(Form.Element.Methods)
										});
										
										/*--------------------------------------------------------------------------*/
										
										var Field = Form.Element;
										var $F = Form.Element.getValue;
										
										/*--------------------------------------------------------------------------*/
										
										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);
										}
										},
										
										inputSelector: function(element) {
										return element.checked ? element.value : null;
										},
										
										textarea: function(element) {
										return element.value;
										},
										
										select: function(element) {
										return this[element.type == 'select-one' ?
										'selectOne' : 'selectMany'](element);
										},
										
										selectOne: function(element) {
										var index = element.selectedIndex;
										return index >= 0 ? this.optionValue(element.options[index]) : null;
										},
										
										selectMany: function(element) {
										var values, length = element.length;
										if (!length) return null;
										
										for (var i = 0, values = []; i < length; i++) {
										var opt = element.options[i];
										if (opt.selected) values.push(this.optionValue(opt));
										}
										return values;
										},
										
										optionValue: function(opt) {
										// extend element because hasAttribute may not be native
										return Element.extend(opt).hasAttribute('value') ? opt.value : opt.text;
										}
										}
										
										/*--------------------------------------------------------------------------*/
										
										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();
										var changed = ('string' == typeof this.lastValue && 'string' == typeof value
										? this.lastValue != value : String(this.lastValue) != String(value));
										if (changed) {
										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' &&
										(Prototype.Browser.WebKit || element.attachEvent))
										name = 'keydown';
										
										Event._observeAndCache(element, name, observer, useCapture);
										},
										
										stopObserving: function(element, name, observer, useCapture) {
										element = $(element);
										useCapture = useCapture || false;
										
										if (name == 'keypress' &&
										(Prototype.Browser.WebKit || element.attachEvent))
										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 (Prototype.Browser.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) {
										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 (Prototype.Browser.WebKit) {
										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();