<script language="JavaScript1.2">

//change 1 to another integer to alter the scroll speed. Greater is faster
var speed=1
var currentpos=0,alt=1,curpos1=0,curpos2=-1

function initialize(){
  startit()
}

function scrollwindow(){
if (document.all)
  temp=document.body.scrollTop
else
  temp=window.pageYOffset
if (alt==0)
         alt=1
else
  alt=0
if (alt==0)
  curpos1=temp
else
  curpos2=temp
if (curpos1!=curpos2){
  if (document.all)
   currentpos=document.body.scrollTop+speed
  else
          currentpos=window.pageYOffset+speed
  window.scroll(0,currentpos)
}
else{
  currentpos=0
         window.scroll(0,currentpos)
}
}

function startit(){
  setInterval("scrollwindow()",10)
}
window.onload=initialize
</script>