var speed=50;
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)}