上下无间断滚动图像

iv id=demo style="OVERFLOW: hidden; WIDTH: 90px; HEIGHT: 100px" background:#214984;color:#ffffff>
<div id=demo1><img height=31 src="http://www.alixixi.com/images/link.gif" width=88> <img height=31 src="http://www.alixixi.com/images/link.gif" width=88> <img height=31 src="http://www.alixixi.com/images/link.gif" width=88> <img height=31 src="http://www.alixixi.com/images/link.gif" width=88> <img height=31 src="http://www.alixixi.com/images/link.gif" width=88> <img height=31 src="http://www.alixixi.com/images/link.gif" width=88> <img height=31 src="http://www.alixixi.com/images/link.gif" width=88> <img height=31 src="http://www.alixixi.com/images/link.gif" width=88> <img height=31 src="http://www.alixixi.com/images/link.gif" width=88> </div>
<div id=demo2></div></div>
<SCRIPT> 
   var speed=30 
   demo2.innerHTML=demo1.innerHTML //克隆demo1为demo2 
   function Marquee(){ 
//当滚动至demo1与demo2交界时 
if(demo2.offsetTop-demo.scrollTop<=0)   
demo.scrollTop-=demo1.offsetHeight //demo跳到最顶端 
else{ 
demo.scrollTop++ 
   } 
   } 
   var MyMar=setInterval(Marquee,speed)//设置定时器 
//鼠标移上时清除定时器达到滚动停止的目的 
   demo.οnmοuseοver=function() {clearInterval(MyMar)} 
//鼠标移开时重设定时器 
   demo.οnmοuseοut=function(){MyMar=setInterval(Marquee,speed)} 
</SCRIPT>