var speed=20
demo2.innerhtml=demo1.innerhtml
demo.scrollleft=demo.scrollwidth
function marquee(){
if(demo.scrollleft<=0)
demo.scrollleft+=demo2.offsetwidth
else{
demo.scrollleft--
}
}
var mymar=setinterval(marquee,speed)
demo.onmouseover=function() {clearinterval(mymar)}
demo.onmouseout=function() {mymar=setinterval(marquee,speed)}