this.scroll=function(){
	var height=425;
	var obj=document.getElementById('scroll');
	var container=document.getElementById('content');
	document.getElementById('scrollUp').onmouseover=function(){obj.up=true};
	document.getElementById('scrollUp').onmouseout=function(){obj.up=false};
	document.getElementById('scrollDown').onmouseover=function(){obj.down=true};
	document.getElementById('scrollDown').onmouseout=function(){obj.down=false};
	document.getElementById('scrollUp').onmousedown=document.getElementById('scrollDown').onmousedown=function(){obj.fast=true};
	document.getElementById('scrollUp').onmouseup=document.getElementById('scrollDown').onmouseup=function(){obj.fast=false};
	obj.up=false;
	obj.down=false;
	obj.fast=false;
	this.start=function(){
		var newTop;
		var objHeight=obj.offsetHeight;
		var top=obj.offsetTop;
		var fast=(obj.fast)?2:1;
		if(obj.down){
			newTop=((objHeight+top)>height)?top-(10*fast):top;
			obj.style.top=newTop+'px';
		};
		if(obj.up){
			newTop=(top<0)?top+(10*fast):top;
			obj.style.top=newTop+'px';
		};
	};
	obj.interval=setInterval('start()',50);
};
this.addEvent=function(obj,type,fn){
	if(obj.attachEvent){
		obj['e'+type+fn]=fn;
		obj[type+fn]=function(){obj['e'+type+fn](window.event)};
		obj.attachEvent('on'+type,obj[type+fn]);
	}else{
		obj.addEventListener(type,fn,false);
	};
};
addEvent(window,'load',scroll);