var speed=40;
var demoUp=document.getElementById("demoUp");
var demoUp2=document.getElementById("demoUp2");
var demoUp1=document.getElementById("demoUp1");
demoUp2.innerHTML=demoUp1.innerHTML;
function Marquee(){
 if(demoUp2.offsetTop-demoUp.scrollTop<=0)
  demoUp.scrollTop-=demoUp1.offsetHeight;
 else{
  demoUp.scrollTop++;
 }
}
var MyMar=setInterval(Marquee,speed);
demoUp.onmouseover=function() {clearInterval(MyMar)}
demoUp.onmouseout=function() {MyMar=setInterval(Marquee,speed)}