/*  Prototype JavaScript framework
 *  (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/
/*--------------------------------------------------------------------------*/

//note: modified & stripped down version of prototype, to be used with moo.fx by mad4milk (http://moofx.mad4milk.net).

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

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

Function.prototype.bind = function(object) {
	var __method = this;
	return function() {
		return __method.apply(object, arguments);
	}
}

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

function $() {
	if (arguments.length == 1) return get$(arguments[0]);
	var elements = [];
	$c(arguments).each(function(el){
		elements.push(get$(el));
	});
	return elements;

	function get$(el){
		if (typeof el == 'string') el = document.getElementById(el);
		return el;
	}
}

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

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

	hasClassName: function(element, className) {
		element = $(element);
		if (!element) return;
		var hasClass = false;
		element.className.split(' ').each(function(cn){
			if (cn == className) hasClass = true;
		});
		return hasClass;
	},

	addClassName: function(element, className) {
		element = $(element);
		Element.removeClassName(element, className);
		element.className += ' ' + className;
	},
  
	removeClassName: function(element, className) {
		element = $(element);
		if (!element) return;
		var newClassName = '';
		element.className.split(' ').each(function(cn, i){
			if (cn != className){
				if (i > 0) newClassName += ' ';
				newClassName += cn;
			}
		});
		element.className = newClassName;
	},

	cleanWhitespace: function(element) {
		element = $(element);
		$c(element.childNodes).each(function(node){
			if (node.nodeType == 3 && !/\S/.test(node.nodeValue)) Element.remove(node);
		});
	},

	find: function(element, what) {
		element = $(element)[what];
		while (element.nodeType != 1) element = element[what];
		return element;
	}
});

var Position = {
	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];
	}
};

document.getElementsByClassName = function(className) {
	var children = document.getElementsByTagName('*') || document.all;
	var elements = [];
	$c(children).each(function(child){
		if (Element.hasClassName(child, className)) elements.push(child);
	});  
	return elements;
}

//useful array functions
Array.prototype.iterate = function(func){
	for(var i=0;i<this.length;i++) func(this[i], i);
}
if (!Array.prototype.each) Array.prototype.each = Array.prototype.iterate;

function $c(array){
	var nArray = [];
	for (var i=0;i<array.length;i++) nArray.push(array[i]);
	return nArray;
}


/*
moo.fx, simple effects library built with prototype.js (http://prototype.conio.net).
by Valerio Proietti (http://mad4milk.net) MIT-style LICENSE.
for more info (http://moofx.mad4milk.net).
Sunday, March 05, 2006
v 1.2.3
*/

var fx = new Object();
//base
fx.Base = function(){};
fx.Base.prototype = {
        setOptions: function(options) {
        this.options = {
                duration: 500,
                onComplete: '',
                transition: fx.sinoidal
        }
        Object.extend(this.options, options || {});
        },

        step: function() {
                var time  = (new Date).getTime();
                if (time >= this.options.duration+this.startTime) {
                        this.now = this.to;
                        clearInterval (this.timer);
                        this.timer = null;
                        if (this.options.onComplete) setTimeout(this.options.onComplete.bind(this), 10);
                }
                else {
                        var Tpos = (time - this.startTime) / (this.options.duration);
                        this.now = this.options.transition(Tpos) * (this.to-this.from) + this.from;
                }
                this.increase();
        },

        custom: function(from, to) {
                if (this.timer != null) return;
                this.from = from;
                this.to = to;
                this.startTime = (new Date).getTime();
                this.timer = setInterval (this.step.bind(this), 13);
        },

        hide: function() {
                this.now = 0;
                this.increase();
        },

        clearTimer: function() {
                clearInterval(this.timer);
                this.timer = null;
        }
}

//stretchers
fx.Layout = Class.create();
fx.Layout.prototype = Object.extend(new fx.Base(), {
        initialize: function(el, options) {
                this.el = $(el);
                this.el.style.overflow = "hidden";
                this.iniWidth = this.el.offsetWidth;
                this.iniHeight = this.el.offsetHeight;
                this.setOptions(options);
        }
});

fx.Height = Class.create();
Object.extend(Object.extend(fx.Height.prototype, fx.Layout.prototype), {
        increase: function() {
                this.el.style.height = this.now + "px";
        },

        toggle: function() {
                if (this.el.offsetHeight > 0) this.custom(this.el.offsetHeight, 0);
                else this.custom(0, this.el.scrollHeight);
        }
});

fx.Width = Class.create();
Object.extend(Object.extend(fx.Width.prototype, fx.Layout.prototype), {
        increase: function() {
                this.el.style.width = this.now + "px";
        },

        toggle: function(){
                if (this.el.offsetWidth > 0) this.custom(this.el.offsetWidth, 0);
                else this.custom(0, this.iniWidth);
        }
});

//fader
fx.Opacity = Class.create();
fx.Opacity.prototype = Object.extend(new fx.Base(), {
        initialize: function(el, options) {
                this.el = $(el);
                this.now = 1;
                this.increase();
                this.setOptions(options);
        },

        increase: function() {
                if (this.now == 1 && (/Firefox/.test(navigator.userAgent))) this.now = 0.9999;
                this.setOpacity(this.now);
        },

        setOpacity: function(opacity) {
                if (opacity == 0 && this.el.style.visibility != "hidden") this.el.style.visibility = "hidden";
                else if (this.el.style.visibility != "visible") this.el.style.visibility = "visible";
                if (window.ActiveXObject) this.el.style.filter = "alpha(opacity=" + opacity*100 + ")";
                this.el.style.opacity = opacity;
        },

        toggle: function() {
                if (this.now > 0) this.custom(1, 0);
                else this.custom(0, 1);
        }
});

//transitions
fx.sinoidal = function(pos){
        return ((-Math.cos(pos*Math.PI)/2) + 0.5);
        //this transition is from script.aculo.us
}
fx.linear = function(pos){
        return pos;
}
fx.cubic = function(pos){
        return Math.pow(pos, 3);
}
fx.circ = function(pos){
        return Math.sqrt(pos);
}