Autoscroll with Javascript

In this example we have a TEXTAREA that will always scroll to the bottom.
I used this in a chat, so you would'nt have to scroll down manually. When the other person in the chat added some text you would see it

 HTML

I have removed most of the styling from this example to keep it clear.

<DIV ALIGN='center'>

<TEXTAREA STYLE='width:480px;height:300px;' id='textarea_id' DISABLED>

Hello world!

</TEXTAREA>

</DIV>

 Javascript

Put this snippet at the end of you page.

<script type="text/javascript">
var textarea = document.getElementById('textarea_id');
textarea.scrollTop = textarea.scrollHeight;
</script>

 PHP