var Blackbox=new Class({Implements:Options,options:{element:null,bgcolor:"#000",duration:500,height:400,pause:false,start:1,wait:5000},initialize:function(ulel,options){this.setOptions(options);this.options.element=$(ulel);$(ulel).set("blackbox",this);$(ulel).setStyle("height",this.options.height);if($(ulel).getStyle("position")!="absolute"&&$(ulel).getStyle("position")!="fixed"){$(ulel).setStyles({position:"relative"})}$(ulel).getChildren().each(function(liel,i){liel.addClass("blackbox"+ ++i);liel.setStyles({backgroundColor:this.options.bgcolor,display:"block",opacity:0,overflow:"hidden",position:"absolute",top:0,right:0,bottom:0,left:0,zIndex:1});if(i==this.options.start){liel.setStyles({opacity:1,zIndex:2})}else{if(i==this.getNextItem(this.options.start)){liel.setStyle("opacity",1)}}}.bind(this));this.start.delay(this.options.wait,this,[this.options.start])},start:function(i){if(this.options.pause){this.options.pause=false;return}var el=this.options.element;if(!i){i=el.getElement("li[style*='z-index: 2;']").get("class").replace("blackbox","").toInt()}var cur=el.getElement(".blackbox"+i);var next=this.getNextItem(i);cur.set("tween",{duration:this.options.duration}).fade("out").get("tween").chain(function(){cur.setStyle("z-index",1);el.getElement(".blackbox"+next).setStyle("z-index","2");el.getElement(".blackbox"+this.getNextItem(next)).setStyle("opacity","1");this.start.delay(this.options.wait,this,[next])}.bind(this))},stop:function(){this.options.pause=true},getNextItem:function(i){var el=this.options.element;if(!el.getElement("li.blackbox"+(i+1))){return 1}return i+1}});Element.Properties.blackbox={get:function(){return this.retrieve("blackbox")},set:function(value){this.store("blackbox",value)}};