JavaScript - How Do I Set Autoscroll Using Dyn-web?

Hello everyone,
What I'm trying to do just doesn't seem like it should be that difficult but I'm sure struggling with lacking skills I should say.
I'm trying to automatically scroll a div up and down. For say if div.scrollTop = 0 then scroll to the bottom once it reaches the bottom scroll back up and so forth not stopping in a loop with say a timeout of 10.. Just need help putting it all together. Any input is much appreciated!!

I've figured some stuff out:
I can tell if I'm at the bottom of the scrollable area with:
PHP Code:
(document.getElementById(id).clientHeight + document.getElementById(id).scrollTop) - document.getElementById(id).scrollHeight 


Or if I'm at the top of the scrollable area if:
PHP Code:
document.getElementById(id).scrollTop = 0 


psuedo:
PHP Code:
function scrollDivDown(id){ 
clearTimeout(timerDown)  
document.getElementById(id).scrollTop+=step  
timerDown=setTimeout("scrollDivDown('"+id+"')",10) 
}  
 
function scrollDivUp(id){ 
clearTimeout(timerUp) 
document.getElementById(id).scrollTop-=step  
timerUp=setTimeout("scrollDivUp('"+id+"')",10) 
}
 
timerDown=""  
timerUp=""
 
function scrollMe(id){
var iScrollHeight = document.getElementById(id).scrollHeight
var iScrollTop = document.getElementById(id).scrollTop
var iClientHeight = document.getElementById(id).clientHeight
var iPOS = (iClientHeight + iScrollTop) - iScrollHeight
if (iPOS < 0)
{
    scrollDivDown(id)
}
else if (iPOS = 0)
{
    scrollDivUp(id)
} 

Hi,
I am using the code:

Code:

function ScrollFW(){
self.scrollBy(0,3)
}

function playScrollFW(){
bTmp=setInterval('ScrollFW()',5)
}
window.onload=playScrollFW

and it auto scrolls the page to the end and stops. I'd like the autoscrolling to stop once a user clicks anywhere on the page.
Any ideas please?
Thanks