function scrollInterval()
 {
  gsdemo2.innerHTML=gsdemo1.innerHTML;
  if(gsdemo.scrollTop==2*gsdemo1.scrollHeight-gsdemo.offsetHeight)
  {
   gsdemo.scrollTop=gsdemo1.scrollHeight-gsdemo.offsetHeight;
  }
  else
  {
   gsdemo.scrollTop++;
  }
  if(gsdemo.scrollTop%20==0)
  {
   window.setTimeout( "scrollInterval()", 2000 );
  }
   else 
   {
   window.setTimeout( "scrollInterval()", 10);
   }
 }
 window.onload=function b()
 {
  var gsdemo=document.getElementById("gsdemo");
  var gsdemo1=document.getElementById("gsdemo1");
  var gsdemo2=document.getElementById("gsdemo2");
  window.setTimeout("scrollInterval()",2000);
 }