/**************************************************************



	Script		: Overlay

	Version		: 1.2

	Authors		: Samuel birch

	Desc		: Covers the window with a semi-transparent layer.

	Licence		: Open Source MIT Licence



**************************************************************/



function showSB(){

	var s = document.getElementsByTagName('select');

	for (i = 0; i != s.length; i++) {s[i].style.visibility = 'visible';}

}

function hideSB(){

	var s = document.getElementsByTagName('select');

	for (i = 0; i != s.length; i++) {s[i].style.visibility = 'hidden';}

}

function showFL(){

	var fO = document.getElementsByTagName('object');

	for (i = 0; i < fO.length; i++) {fO[i].style.visibility = 'visible';}

	var fE = document.getElementsByTagName('embed');

	for (i = 0; i < fE.length; i++) {fE[i].style.visibility = 'visible';}

}

function hideFL(){

	var fO = document.getElementsByTagName('object');

	for (i = 0; i < fO.length; i++) {fO[i].style.visibility = 'hidden';}

	var fE = document.getElementsByTagName('embed');

	for (i = 0; i < fE.length; i++) {fE[i].style.visibility = 'hidden';}

}





var Overlay = new Class({

	

	getOptions: function(){

		return {

			opacity: 0.7,

			zIndex: 1001,

			container: document.body,

			onClick: Class.empty

		};

	},



	initialize: function(options){

		this.setOptions(this.getOptions(), options);

		

		this.options.container = $(this.options.container);

		

		this.container = new Element('div').setProperty('id', 'OverlayContainer').setStyles({

			position: 'absolute',

			left: '0px',

			top: '0px',

			width: '100%',

			display: 'none',

			zIndex: this.options.zIndex

		}).injectInside(this.options.container);

		

		this.iframe = new Element('iframe').setProperties({

			'id': 'OverlayIframe',

			'name': 'OverlayIframe',

			'src': 'javascript:void(0);',

			'frameborder': 1,

			'scrolling': 'no'

		}).setStyles({

			'position': 'absolute',

			'top': 0,

			'left': 0,

			'width': '99%',

			'height': '100%',

			'filter': 'progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)',

			'opacity': 0,

			'zIndex': 1

		}).injectInside(this.container);

		

		this.overlay = new Element('div').setProperty('id', 'Overlay').setStyles({

			position: 'absolute',

			left: '0px',

			top: '0px',

			width: '100%',

			height: '100%',

			zIndex: 2

		}).injectInside(this.container);

		

		this.container.addEvent('click', function(){

			this.options.onClick();

		}.bind(this));

		

		this.fade = new Fx.Style(this.container, 'opacity').set(0);

		this.position();

		

		window.addEvent('resize', this.position.bind(this));

	},

	

	position: function(){ 

		if(this.options.container == document.body){ 

			var h = window.getScrollHeight()+'px'; 

			this.container.setStyles({top: '0px', height: h}); 

		}else{ 

			var myCoords = this.options.container.getCoordinates(); 

			this.container.setStyles({

				top: myCoords.top+'px', 

				height: myCoords.height+'px', 

				left: myCoords.left+'px', 

				width: myCoords.width+'px'

			}); 

		} 

	},

	

	

	

	show: function(){

		hideSB();

		hideFL();

		this.fade.start(0,this.options.opacity);

		document.getElementById('OverlayContainer').style.display = '';

	},

	

	hide: function(){

		this.fade.start(this.options.opacity,0);

		showSB();

		showFL();

		document.getElementById('OverlayContainer').style.display = 'none';

}	

	

	

});

Overlay.implement(new Options);



/*************************************************************/