//Overlay
var Modalizer = new Class({
	defaultModalStyle: {
		display:'block',
		position:'fixed',
		top:0,
		left:0,	
		'z-index':800,
		'background-color':'#333',
		opacity:0
	},
	setModalOptions: function(options){
		this.modalOptions = $merge({
			width:(window.getScrollSize().x),
			height:(window.getScrollSize().y),
			elementsToHide: 'select, embed' + (Browser.Engine.trident ? '': ', object'),
			hideOnClick: true,
			modalStyle: {},
			updateOnResize: true,
			layerId: 'modalOverlay',
			onModalHide: $empty,
			onModalShow: $empty
		}, this.modalOptions, options);
		return this;
	},
	layer: function(){
		if (!this.modalOptions.layerId) this.setModalOptions();
		return $(this.modalOptions.layerId) || new Element('div', {id: this.modalOptions.layerId}).inject(document.body);
	},
	resize: function(){
		if (this.layer()) {
			this.layer().setStyles({
				width:(window.getScrollSize().x),
				height:(window.getScrollSize().y)
			});
		}
	},
	setModalStyle: function (styleObject){
		this.modalOptions.modalStyle = styleObject;
		this.modalStyle = $merge(this.defaultModalStyle, {
			width:this.modalOptions.width,
			height:this.modalOptions.height
		}, styleObject);
		if (this.layer()) this.layer().setStyles(this.modalStyle);
		return(this.modalStyle);
	},
	modalShow: function(options){
		this.setModalOptions(options);
		this.layer().setStyles(this.setModalStyle(this.modalOptions.modalStyle));
		if (Browser.Engine.trident4) this.layer().setStyle('position','absolute');
		this.layer().removeEvents('click').addEvent('click', function(){
			this.modalHide(this.modalOptions.hideOnClick);
		}.bind(this));
		this.bound = this.bound||{};
		if (!this.bound.resize && this.modalOptions.updateOnResize) {
			this.bound.resize = this.resize.bind(this);
			window.addEvent('resize', this.bound.resize);
		}
		if ($type(this.modalOptions.onModalShow)  == "function") this.modalOptions.onModalShow();
		this.togglePopThroughElements(0);
		//this.layer().setStyle('display','block');
		this.layer().fade(0.8)
		return this;
	},
	modalHide: function(override, force){
		if (override === false) return false; //this is internal, you don't need to pass in an argument
		this.togglePopThroughElements(1);
		if ($type(this.modalOptions.onModalHide) == "function") this.modalOptions.onModalHide();
		this.layer().setStyle('display','none');
		//.fade(1);
		if (this.modalOptions.updateOnResize) {
			this.bound = this.bound||{};
			if (!this.bound.resize) this.bound.resize = this.resize.bind(this);
			window.removeEvent('resize', this.bound.resize);
		}
		return this;
	},
	togglePopThroughElements: function(opacity){
		if (Browser.Engine.trident4 || (Browser.Engine.gecko && Browser.Platform.mac)) {
			$$(this.modalOptions.elementsToHide).each(function(sel){
				sel.setStyle('opacity', opacity);
			});
		}
	}
});