var speed=80
var demo=document.getElementById("demo"); 
var demo2=document.getElementById("demo2"); 
var demo1=document.getElementById("demo1"); 
demo2.innerHTML=demo1.innerHTML 
function Marquee(){ 
 if(demo2.offsetTop-demo.scrollTop<=0) 
  demo.scrollTop-=demo1.offsetHeight 
 else{ 
  demo.scrollTop++ 
 } 
} 
var MyMar=setInterval(Marquee,speed) 
demo.onmouseover=function() {clearInterval(MyMar)} 
demo.onmouseout=function() {MyMar=setInterval(Marquee,speed)}