Controlling scroll of a DIV problem!

Hi!
I am trying to make a chat program, and now I want the div to scroll down (entirely down), [I]if[/I] the scroll bar already is at the bottom, when the text changes.
[URL=”http://erlendhl.ueuo.com/c/ExternalChat.html”]So Here is the test page.[/URL]
Notice the little debugging area at the bottom.
You see that when you scroll the DIV (with message story) entirely down, the scrollTop and scrollHeight does not match, so how, exactly, do I check if the scroll is at the bottom?

Notice that if the server is down, or if you don’t see what I am explaining, try to refresh the page, or wait a little and then refresh.

[B]Thanks!![/B]

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