var speed1=30
var MyMar1=setInterval(Marquee1,speed1)
demo2.innerHTML=demo1.innerHTML
demo.onmouseover=function() {clearInterval(MyMar1)}
demo.onmouseout=function() {MyMar1=setInterval(Marquee1,speed1)}
function Marquee1(){
if(demo2.offsetWidth-demo.scrollLeft<=0)
   demo.scrollLeft-=demo1.offsetWidth
else{
   demo.scrollLeft++
}
}