var Overlay=new Class({getOptions:function(){return{colour:"#444",opacity:0.5,zIndex:1,container:document.body,onClick:new Class()}},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%",visibility:"hidden",overflow:"hidden",zIndex:this.options.zIndex}).inject(this.options.container,"inside");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:1}).inject(this.container,"inside");this.overlay=new Element("div").setProperty("id","Overlay").setStyles({position:"absolute",left:"0px",top:"0px",width:"100%",height:"100%",zIndex:2,backgroundColor:this.options.colour}).inject(this.container,"inside");this.container.addEvent("click",function(){this.options.onClick()}.bind(this));this.fade=new Fx.Morph(this.container,{transition:Fx.Transitions.Expo.easeInOut,wait:false,duration:500}).set({opacity:0});this.position();window.addEvent("resize",this.position.bind(this))},position:function(){if(this.options.container==document.body){var a=document.getScrollSize().x+"px";this.container.setStyles({top:"0px",height:"100%"})}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({opacity:[0,this.options.opacity],visibility:"visible"})},hide:function(){this.fade.start({opacity:[0,this.options.opacity],visibility:"hidden"})}});Overlay.implement(new Options);