var scroller={
	object:null,
	rate:2,
	delay:1.0/30,
	executer:null,
	start:function(){
		object=$$('#scroller p');
		if(object.length){
			object=object[0];
			object.style.position='absolute';
			object.style.left=object.up().getWidth()+'px';
			var rate=this.rate;
			executer=new PeriodicalExecuter(function(){
				var x=(parseInt(object.style.left)-rate);
				if(x<-object.getWidth())x=object.up().getWidth();
				object.style.left=x+'px';
			},this.delay); 
		}else
			object=null;
	},
	stop:function(){
		if(executer)executer.stop();
	}
};