/*  Prototype JavaScript framework, version 1.4.0
 *  (c) 2005 Sam Stephenson <sam@conio.net>
 *
 *  Prototype is freely distributable under the terms of an MIT-style license.
 *  For details, see the Prototype web site: http://prototype.conio.net/
 *
/*--------------------------------------------------------------------------*/

var Prototype = {
	Version: '1.4.0',
	ScriptFragment: '(?:<script.*?>)((\n|\r|.)*?)(?:<\/script>)',

	emptyFunction: function() {},
	K: function(x) {return x;}
};

var Class = {
	create: function() {
		return function() {
			this.initialize.apply(this, arguments);
		};
	}
};

var Abstract = new Object();

Object.extend = function(destination, source) {
	for (var property in source) {
		destination[property] = source[property];
	}
	return destination;
};

Object.inspect = function(object) {
	try {
		if (object == undefined) return 'undefined';
		if (object == null) return 'null';
		return object.inspect ? object.inspect() : object.toString();
	} catch (e) {
		if (e instanceof RangeError) return '...';
		throw e;
	}
};

Function.prototype.bind = function() {
	var __method = this, args = $A(arguments), object = args.shift();
	return function() {
		return __method.apply(object, args.concat($A(arguments)));
	};
};

Function.prototype.bindAsEventListener = function(object) {
	var __method = this;
	return function(event) {
		return __method.call(object, event || window.event);
	};
};

Object.extend(Number.prototype, {
	toColorPart: function() {
		var digits = this.toString(16);
		if (this < 16) return '0' + digits;
		return digits;
	},

	succ: function() {
		return this + 1;
	},

	times: function(iterator) {
		$R(0, this, true).each(iterator);
		return this;
	}
});

var Try = {
	these: function() {
		var returnValue;

		for (var i = 0; i < arguments.length; i++) {
			var lambda = arguments[i];
			try {
				returnValue = lambda();
				break;
			} catch (e) {
			}
		}

		return returnValue;
	}
};

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

var PeriodicalExecuter = Class.create();
PeriodicalExecuter.prototype = {
	initialize: function(callback, frequency) {
		this.callback = callback;
		this.frequency = frequency;
		this.currentlyExecuting = false;

		this.registerCallback();
	},

	registerCallback: function() {
		setInterval(this.onTimerEvent.bind(this), this.frequency * 1000);
	},

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

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

function $() {
	var elements = new Array();

	for (var i = 0; i < arguments.length; i++) {
		var element = arguments[i];
		if (typeof element == 'string')
			element = document.getElementById(element);

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

		elements.push(element);
	}

	return elements;
}
Object.extend(String.prototype, {
	stripTags: function() {
		return this.replace(/<\/?[^>]+>/gi, '');
	},

	stripScripts: function() {
		return this.replace(new RegExp(Prototype.ScriptFragment, 'img'), '');
	},

	extractScripts: function() {
		var matchAll = new RegExp(Prototype.ScriptFragment, 'img');
		var matchOne = new RegExp(Prototype.ScriptFragment, 'im');
		return (this.match(matchAll) || []).map(function(scriptTag) {
			return (scriptTag.match(matchOne) || ['', ''])[1];
		});
	},

	evalScripts: function() {
		return this.extractScripts().map(eval);
	},

	escapeHTML: function() {
		var div = document.createElement('div');
		var text = document.createTextNode(this);
		div.appendChild(text);
		return div.innerHTML;
	},

	unescapeHTML: function() {
		var div = document.createElement('div');
		div.innerHTML = this.stripTags();
		return div.childNodes[0] ? div.childNodes[0].nodeValue : '';
	},

	toQueryParams: function() {
		var pairs = this.match(/^\??(.*)$/)[1].split('&');
		return pairs.inject({}, function(params, pairString) {
			var pair = pairString.split('=');
			params[pair[0]] = pair[1];
			return params;
		});
	},

	toArray: function() {
		return this.split('');
	},

	camelize: function() {
		var oStringList = this.split('-');
		if (oStringList.length == 1) return oStringList[0];

		var camelizedString = this.indexOf('-') == 0
				? oStringList[0].charAt(0).toUpperCase() + oStringList[0].substring(1)
				: oStringList[0];

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

		return camelizedString;
	},

	inspect: function() {
		return "'" + this.replace('\\', '\\\\').replace("'", '\\\'') + "'";
	}
});

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

var $break    = new Object();
var $continue = new Object();

var Enumerable = {
	each: function(iterator) {
		var index = 0;
		try {
			this._each(function(value) {
				try {
					iterator(value, index++);
				} catch (e) {
					if (e != $continue) throw e;
				}
			});
		} catch (e) {
			if (e != $break) throw e;
		}
	},

	all: function(iterator) {
		var result = true;
		this.each(function(value, index) {
			result = result && !!(iterator || Prototype.K)(value, index);
			if (!result) throw $break;
		});
		return result;
	},

	any: function(iterator) {
		var result = true;
		this.each(function(value, index) {
			if (result = !!(iterator || Prototype.K)(value, index))
				throw $break;
		});
		return result;
	},

	collect: function(iterator) {
		var results = [];
		this.each(function(value, index) {
			results.push(iterator(value, index));
		});
		return results;
	},

	detect: function (iterator) {
		var result;
		this.each(function(value, index) {
			if (iterator(value, index)) {
				result = value;
				throw $break;
			}
		});
		return result;
	},

	findAll: function(iterator) {
		var results = [];
		this.each(function(value, index) {
			if (iterator(value, index))
				results.push(value);
		});
		return results;
	},

	grep: function(pattern, iterator) {
		var results = [];
		this.each(function(value, index) {
			var stringValue = value.toString();
			if (stringValue.match(pattern))
				results.push((iterator || Prototype.K)(value, index));
		});
		return results;
	},

	include: function(object) {
		var found = false;
		this.each(function(value) {
			if (value == object) {
				found = true;
				throw $break;
			}
		});
		return found;
	},

	inject: function(memo, iterator) {
		this.each(function(value, index) {
			memo = iterator(memo, value, index);
		});
		return memo;
	},

	invoke: function(method) {
		var args = $A(arguments).slice(1);
		return this.collect(function(value) {
			return value[method].apply(value, args);
		});
	},

	max: function(iterator) {
		var result;
		this.each(function(value, index) {
			value = (iterator || Prototype.K)(value, index);
			if (value >= (result || value))
				result = value;
		});
		return result;
	},

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

	partition: function(iterator) {
		var trues = [], falses = [];
		this.each(function(value, index) {
			((iterator || Prototype.K)(value, index) ?
			 trues : falses).push(value);
		});
		return [trues, falses];
	},

	pluck: function(property) {
		var results = [];
		this.each(function(value, index) {
			results.push(value[property]);
		});
		return results;
	},

	reject: function(iterator) {
		var results = [];
		this.each(function(value, index) {
			if (!iterator(value, index))
				results.push(value);
		});
		return results;
	},

	sortBy: function(iterator) {
		return this.collect(function(value, index) {
			return {value: value, criteria: iterator(value, index)};
		}).sort(function(left, right) {
			var a = left.criteria, b = right.criteria;
			return a < b ? -1 : a > b ? 1 : 0;
		}).pluck('value');
	},

	toArray: function() {
		return this.collect(Prototype.K);
	},

	zip: function() {
		var iterator = Prototype.K, args = $A(arguments);
		if (typeof args.last() == 'function')
			iterator = args.pop();

		var collections = [this].concat(args).map($A);
		return this.map(function(value, index) {
			iterator(value = collections.pluck(index));
			return value;
		});
	},

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

Object.extend(Enumerable, {
	map:     Enumerable.collect,
	find:    Enumerable.detect,
	select:  Enumerable.findAll,
	member:  Enumerable.include,
	entries: Enumerable.toArray
});
//noinspection AssignmentResultUsedJS
var $A = Array.from = function(iterable) {
	if (!iterable) return [];
	if (iterable.toArray) {
		return iterable.toArray();
	} else {
		var results = [];
		for (var i = 0; i < iterable.length; i++)
			results.push(iterable[i]);
		return results;
	}
};

var Enum = Class.create();
Object.extend(Enum.prototype, Enumerable);
Object.extend(Enum.prototype, {
	initialize : function(_arr, _def) {
		if(typeof(_arr) != 'undefined' && _arr != null) {
			if(typeof(_def) == 'string') this.defaultValue = _def;
			for(var el in _arr) {
				if(typeof(_arr[el]) == 'string') {
					if(el*1 == el) {
						this[_arr[el].replace(/[\s+\.]/g,'_').replace(/([a-z])([A-Z]+)/g,'$1_$2').toUpperCase()] = _arr[el];
					}else{
						this[el] = _arr[el];
					}
					if(typeof(this.defaultValue) == 'undefined') {
						this.defaultValue = el;
					}
				}
			}
		}
		if(typeof(this.defaultValue) == 'undefined') this.defaultValue = '';
	},
	makeMarker : function(_inp){
		if(typeof(_inp) != 'undefined' && _inp != null ) {
			for(var el in this) {
				if(typeof(this[el]) == 'string' && this[el] == _inp) return this[el];
			}
		}
		return this.defaultValue;
	},
	toString : function() {
		return this.inspect();
	},
	each : function(_f) {
		for(var el in this) {
			if(typeof(this[el]) == 'string' && typeof(_f) == 'function') _f(this[el], el);
		}
	},
	inspect: function() {
		return 'Enum : {' + this.map(function(_value, _index) {
			if(typeof(_value) == 'string') return '' + _index + ' : ' + _value;
		}).join(', ') + '}';
	}
});

Object.extend(Array.prototype, Enumerable);

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

Object.extend(Array.prototype, {
	_each: function(iterator) {
		for (var i = 0; i < this.length; i++)
			iterator(this[i]);
	},

	clear: function() {
		this.length = 0;
		return this;
	},

	first: function() {
		return this[0];
	},

	last: function() {
		return this[this.length - 1];
	},

	compact: function() {
		return this.select(function(value) {
			return value != undefined || value != null;
		});
	},

	flatten: function() {
		return this.inject([], function(array, value) {
			return array.concat(value.constructor == Array ?
			                    value.flatten() : [value]);
		});
	},

	without: function() {
		var values = $A(arguments);
		return this.select(function(value) {
			return !values.include(value);
		});
	},

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

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

	shift: function() {
		var result = this[0];
		for (var i = 0; i < this.length - 1; i++)
			this[i] = this[i + 1];
		this.length--;
		return result;
	},

	inspect: function() {
		return '[' + this.map(Object.inspect).join(', ') + ']';
	}
});
var Hash = {
	_each: function(iterator) {
		for (var key in this) {
			var value = this[key];
			if (typeof value == 'function') continue;

			var pair = [key, value];
			pair.key = key;
			pair.value = value;
			iterator(pair);
		}
	},

	keys: function() {
		return this.pluck('key');
	},

	values: function() {
		return this.pluck('value');
	},

	merge: function(hash) {
		return $H(hash).inject($H(this), function(mergedHash, pair) {
			mergedHash[pair.key] = pair.value;
			return mergedHash;
		});
	},

	toQueryString: function() {
		return this.map(function(pair) {
			return pair.map(encodeURIComponent).join('=');
		}).join('&');
	},

	inspect: function() {
		return '#<Hash:{' + this.map(function(pair) {
			return pair.map(Object.inspect).join(': ');
		}).join(', ') + '}>';
	}
};

function $H(object) {
	var hash = Object.extend({}, object || {});
	Object.extend(hash, Enumerable);
	Object.extend(hash, Hash);
	return hash;
}
var ObjectRange = Class.create();
Object.extend(ObjectRange.prototype, Enumerable);
Object.extend(ObjectRange.prototype, {
	initialize: function(start, end, exclusive) {
		this.start = start;
		this.end = end;
		this.exclusive = exclusive;
	},

	_each: function(iterator) {
		var value = this.start;
		do {
			iterator(value);
			value = value.succ();
		} while (this.include(value));
	},

	include: function(value) {
		if (value < this.start)
			return false;
		if (this.exclusive)
			return value < this.end;
		return value <= this.end;
	}
});

var $R = function(start, end, exclusive) {
	return new ObjectRange(start, end, exclusive);
};

var TextHelper = {
	countWords : function(text) {
		var match = text.match(/[^\s]+/gm);
		return match == null ? 0 : match.length;
	}
};

var Format = function(_type, _formatString, _prefix, _suffix) {
	this.type = Formatter.makeMarker(_type);
	this.formatString = _formatString ? _formatString : '';
	this.prefix = _prefix ? _prefix : '';
	this.suffix = _suffix ? _suffix : '';
};

var Formatter = new Enum(['string','number','date'],'string');
Object.extend(Formatter, {
	NumberFormattingTypeEnum : new Enum({NONE : '',CURRENCY : '.00',PERCENT : '.##'},''),
	DateFormattingTypeEnum : new Enum({NONE : '',AMERICAN : 'MM/dd/YYYY'}),
	format : function(_value, _format /*Format*/) {
		var value = _format.type == this.DATE ? this.formatDate(_value, _format) :
		            _format.type == this.NUMBER ? this.formatNumber(_value, _format) : _value;
		return '' + (_format.prefix ? _format.prefix : '') + value + (_format.suffix ? _format.suffix : '');
	},
	formatDate : function(_value, _format) {
		if(_format.type != this.DATE || _format.formatString != this.DateFormattingTypeEnum.AMERICAN
				|| !(_value instanceof Date) ) {
			return _value;
		} else {
			return (_value.getMonth() + 1) + '/' + _value.getDate() + '/'
					+ (_value.getYear() < 116 ? _value.getYear() + 1900 : _value.getYear());
		}
	},
	formatNumber : function(_value, _format) {
		if(_format.type != this.NUMBER || _format.formatString == this.NumberFormattingTypeEnum.NONE
				|| _value * 1 != _value) {
			return _value;
		} else {
			var tmp = new String(Math.round(_value*100)/100);
			if(_format.formatString == this.NumberFormattingTypeEnum.CURRENCY ) {
				if(tmp.lastIndexOf(".")==-1) tmp+=".00";
				else switch(tmp.substring(tmp.lastIndexOf("."),tmp.length-1).length) {
					case 0:
						tmp+="00";
						break;
					case 1:
						tmp+="0";
						break;
				}
			}
			return tmp;
		}
	}
});


















if (!window.Element) {
	var Element = new Object();
}

Object.extend(Element, {
	visible: function(element) {
		return $(element).style.display != 'none';
	},

	toggle: function() {
		for (var i = 0; i < arguments.length; i++) {
			var element = $(arguments[i]);
			Element[Element.visible(element) ? 'hide' : 'show'](element);
		}
	},

	hide: function() {
		for (var i = 0; i < arguments.length; i++) {
			var element = $(arguments[i]);
			element.style.display = 'none';
		}
	},

	show: function() {
		for (var i = 0; i < arguments.length; i++) {
			var element = $(arguments[i]);
			element.style.display = '';
		}
	},

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

	update: function(element, html) {
		$(element).innerHTML = html.stripScripts();
		setTimeout(function() {html.evalScripts()}, 10);
	},

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

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

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

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

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

// removes whitespace-only text node children
	cleanWhitespace: function(element) {
		element = $(element);
		for (var i = 0; i < element.childNodes.length; i++) {
			var node = element.childNodes[i];
			if (node.nodeType == 3 && !/\S/.test(node.nodeValue))
				Element.remove(node);
		}
	},

	empty: function(element) {
		return $(element).innerHTML.match(/^\s*$/);
	},

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

	getStyle: function(element, style) {
		element = $(element);
		var value = element.style[style.camelize()];
		if (!value) {
			if (document.defaultView && document.defaultView.getComputedStyle) {
				var css = document.defaultView.getComputedStyle(element, null);
				value = css ? css.getPropertyValue(style) : null;
			} else if (element.currentStyle) {
				value = element.currentStyle[style.camelize()];
			}
		}

		if (window.opera && ['left', 'top', 'right', 'bottom'].include(style))
			if (Element.getStyle(element, 'position') == 'static') value = 'auto';

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

	setStyle: function(element, style) {
		element = $(element);
		for (var name in style)
			element.style[name.camelize()] = style[name];
	},

	getDimensions: function(element) {
		element = $(element);
		if (Element.getStyle(element, 'display') != 'none')
			return {width: element.offsetWidth, height: element.offsetHeight};

		// All *Width and *Height properties give 0 on elements with display none,
		// so enable the element temporarily
		var els = element.style;
		var originalVisibility = els.visibility;
		var originalPosition = els.position;
		els.visibility = 'hidden';
		els.position = 'absolute';
		els.display = '';
		var originalWidth = element.clientWidth;
		var originalHeight = element.clientHeight;
		els.display = 'none';
		els.position = originalPosition;
		els.visibility = originalVisibility;
		return {width: originalWidth, height: originalHeight};
	},

	makePositioned: function(element) {
		element = $(element);
		var pos = Element.getStyle(element, 'position');
		if (pos == 'static' || !pos) {
			element._madePositioned = true;
			element.style.position = 'relative';
			// Opera returns the offset relative to the positioning context, when an
			// element is position relative but top and left have not been defined
			if (window.opera) {
				element.style.top = 0;
				element.style.left = 0;
			}
		}
	},

	undoPositioned: function(element) {
		element = $(element);
		if (element._madePositioned) {
			element._madePositioned = undefined;
			element.style.position = '';
			element.style.top = '';
			element.style.left = '';
			element.style.bottom = '';
			element.style.right = '';
		}
	},

	makeClipping: function(element) {
		element = $(element);
		if (element._overflow) return;
		element._overflow = element.style.overflow;
		if ((Element.getStyle(element, 'overflow') || 'visible') != 'hidden')
			element.style.overflow = 'hidden';
	},

	undoClipping: function(element) {
		element = $(element);
		if (element._overflow) return;
		element.style.overflow = element._overflow;
		element._overflow = undefined;
	}
});

var Toggle = new Object();
Toggle.display = Element.toggle;

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

Abstract.Insertion = function(adjacency) {
	this.adjacency = adjacency;
};

Abstract.Insertion.prototype = {
	initialize: function(element, content) {
		this.element = $(element);
		this.content = content.stripScripts();

		if (this.adjacency && this.element.insertAdjacentHTML) {
			try {
				this.element.insertAdjacentHTML(this.adjacency, this.content);
			} catch (e) {
				if (this.element.tagName.toLowerCase() == 'tbody') {
					this.insertContent(this.contentFromAnonymousTable());
				} else {
					throw e;
				}
			}
		} else {
			this.range = this.element.ownerDocument.createRange();
			if (this.initializeRange) this.initializeRange();
			this.insertContent([this.range.createContextualFragment(this.content)]);
		}

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

	contentFromAnonymousTable: function() {
		var div = document.createElement('div');
		div.innerHTML = '<table><tbody>' + this.content + '</tbody></table>';
		return $A(div.childNodes[0].childNodes[0].childNodes);
	}
};

var Insertion = new Object();

Insertion.Before = Class.create();
Insertion.Before.prototype = Object.extend(new Abstract.Insertion('beforeBegin'), {
	initializeRange: function() {
		this.range.setStartBefore(this.element);
	},

	insertContent: function(fragments) {
		fragments.each((function(fragment) {
			this.element.parentNode.insertBefore(fragment, this.element);
		}).bind(this));
	}
});

Insertion.Top = Class.create();
Insertion.Top.prototype = Object.extend(new Abstract.Insertion('afterBegin'), {
	initializeRange: function() {
		this.range.selectNodeContents(this.element);
		this.range.collapse(true);
	},

	insertContent: function(fragments) {
		fragments.reverse(false).each((function(fragment) {
			this.element.insertBefore(fragment, this.element.firstChild);
		}).bind(this));
	}
});

Insertion.Bottom = Class.create();
Insertion.Bottom.prototype = Object.extend(new Abstract.Insertion('beforeEnd'), {
	initializeRange: function() {
		this.range.selectNodeContents(this.element);
		this.range.collapse(this.element);
	},

	insertContent: function(fragments) {
		fragments.each((function(fragment) {
			this.element.appendChild(fragment);
		}).bind(this));
	}
});

Insertion.After = Class.create();
Insertion.After.prototype = Object.extend(new Abstract.Insertion('afterEnd'), {
	initializeRange: function() {
		this.range.setStartAfter(this.element);
	},

	insertContent: function(fragments) {
		fragments.each((function(fragment) {
			this.element.parentNode.insertBefore(fragment,
					this.element.nextSibling);
		}).bind(this));
	}
});

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

Element.ClassNames = Class.create();
Element.ClassNames.prototype = {
	initialize: function(element) {
		this.element = $(element);
	},

	_each: function(iterator) {
		this.element.className.split(/\s+/).select(function(name) {
			return name.length > 0;
		})._each(iterator);
	},

	set: function(className) {
		this.element.className = className;
	},

	add: function(classNameToAdd) {
		if (this.include(classNameToAdd)) return;
		this.set(this.toArray().concat(classNameToAdd).join(' '));
	},

	remove: function(classNameToRemove) {
		if (!this.include(classNameToRemove)) return;
		this.set(this.select(function(className) {
			return className != classNameToRemove;
		}).join(' '));
	},

	toString: function() {
		return this.toArray().join(' ');
	}
};

Object.extend(Element.ClassNames.prototype, Enumerable);
var Field = {
	clear: function() {
		for (var i = 0; i < arguments.length; i++)
			$(arguments[i]).value = '';
	},

	focus: function(element) {
		$(element).focus();
	},

	present: function() {
		for (var i = 0; i < arguments.length; i++)
			if ($(arguments[i]).value == '') return false;
		return true;
	},

	select: function(element) {
		$(element).select();
	},

	activate: function(element) {
		element = $(element);
		element.focus();
		if (element.select)
			element.select();
	}
};

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

var Form = {
	serialize: function(form) {
		var elements = Form.getElements($(form));
		var queryComponents = new Array();

		for (var i = 0; i < elements.length; i++) {
			var queryComponent = Form.Element.serialize(elements[i]);
			if (queryComponent)
				queryComponents.push(queryComponent);
		}

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

	getElements: function(form) {
		form = $(form);
		var elements = new Array();

		for (var tagName in Form.Element.Serializers) {
			var tagElements = form.getElementsByTagName(tagName);
			for (var j = 0; j < tagElements.length; j++)
				elements.push(tagElements[j]);
		}
		return elements;
	},

	getInputs: function(form, typeName, name) {
		form = $(form);
		var inputs = form.getElementsByTagName('input');

		if (!typeName && !name)
			return inputs;

		var matchingInputs = new Array();
		for (var i = 0; i < inputs.length; i++) {
			var input = inputs[i];
			if ((typeName && input.type != typeName) ||
			    (name && input.name != name))
				continue;
			matchingInputs.push(input);
		}

		return matchingInputs;
	},

	disable: function(form) {
		var elements = Form.getElements(form);
		for (var i = 0; i < elements.length; i++) {
			var element = elements[i];
			element.blur();
			element.disabled = 'true';
		}
	},

	enable: function(form) {
		var elements = Form.getElements(form);
		for (var i = 0; i < elements.length; i++) {
			var element = elements[i];
			element.disabled = '';
		}
	},

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

	focusFirstElement: function(form) {
		Field.activate(Form.findFirstElement(form));
	},

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

Form.Element = {
	serialize: function(element) {
		element = $(element);
		var method = element.tagName.toLowerCase();
		var parameter = Form.Element.Serializers[method](element);

		if (parameter) {
			var key = encodeURIComponent(parameter[0]);
			if (key.length == 0) return;

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

			return parameter[1].map(function(value) {
				return key + '=' + encodeURIComponent(value);
			}).join('&');
		}
	},

	getValue: function(element) {
		element = $(element);
		var method = element.tagName.toLowerCase();
		var parameter = Form.Element.Serializers[method](element);

		if (parameter)
			return parameter[1];
	}
};

Form.Element.Serializers = {
	input: function(element) {
		switch (element.type.toLowerCase()) {
			case 'submit':
			case 'hidden':
			case 'password':
			case 'text':
				return Form.Element.Serializers.textarea(element);
			case 'checkbox':
			case 'radio':
				return Form.Element.Serializers.inputSelector(element);
		}
		return false;
	},

	inputSelector: function(element) {
		if (element.checked)
			return [element.name, element.value];
	},

	textarea: function(element) {
		return [element.name, element.value];
	},

	select: function(element) {
		return Form.Element.Serializers[element.type == 'select-one' ?
		                                'selectOne' : 'selectMany'](element);
	},

	selectOne: function(element) {
		var value = '', opt, index = element.selectedIndex;
		if (index >= 0) {
			opt = element.options[index];
			value = opt.value;
			if (!value && !('value' in opt))
				value = opt.text;
		}
		return [element.name, value];
	},

	selectMany: function(element) {
		var value = new Array();
		for (var i = 0; i < element.length; i++) {
			var opt = element.options[i];
			if (opt.selected) {
				var optValue = opt.value;
				if (!optValue && !('value' in opt))
					optValue = opt.text;
				value.push(optValue);
			}
		}
		return [element.name, value];
	}
};

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

var $F = Form.Element.getValue;