auto scroling text box useing javascript

[nezbo]

How do i get a text box to auto scroll to the bottom and re run the function every second?

 

This is was i have a the moment (by searching google)

 

<script type="text/javascript">
function autoscrole()
{
theText.selstart = len(theText.TEXT);
}
setInterval("autoscrole()",1000);
autoscrole();
</script>

 

The text box is updated by aJax and it need's to be a disabled text box.