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

	Script		: Overlay
	Version		: 1.2
	Authors		: Samuel Birch, modified by Jonathan Uhlmann
	Desc		: Covers the window with a semi-transparent layer.
	Licence		: Open Source MIT Licence

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

var Overlay=new Class({getOptions:function(){return{color:"#000",opacity:0.7,zIndex:500,container:document.body,onClick:Class.empty}},initialize:function(A){this.setOptions(this.getOptions(),A);this.options.container=$(this.options.container);this.container=new Element("div").setProperty("id","OverlayContainer").setStyles({position:"absolute",left:"0px",top:"0px",width:"100%",overflow:"hidden",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:"100%",height:"100%",filter:"progid:DXImageTransform.Microsoft.Alpha(style=0,opacity=0)",opacity:0,zIndex:500}).injectInside(this.container);this.overlay=new Element("div").setProperty("id","Overlay").setStyles({position:"absolute",left:"0px",top:"0px",width:"100%",height:"100%",zIndex:600,backgroundColor:this.options.color}).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 A=window.getScrollHeight()+"px";this.container.setStyles({top:"0px",height:A})}else{var B=this.options.container.getCoordinates();this.container.setStyles({top:B.top+"px",height:B.height+"px",left:B.left+"px",width:B.width+"px"})}},show:function(){this.fade.start(0,this.options.opacity)},hide:function(){this.fade.start(this.options.opacity,0)}});Overlay.implement(new Options);