var speed=45;
demo2.innerHTML=demo1.innerHTML + demo1.innerHTML +demo1.innerHTML
var bulletMyMar=setInterval(BulletinMarquee,speed) 
function BulletinMarquee()
{
if(demo2.offsetTop-demo.scrollTop<=0) 
demo.scrollTop-=demo1.offsetHeight 
else
{
demo.scrollTop = demo.scrollTop+1;
}
}
demo.onmouseover=function() {clearInterval(bulletMyMar)} 
demo.onmouseout=function() {bulletMyMar=setInterval(BulletinMarquee,speed)}