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)}// JavaScript Document