I have this CSS for Internet Explorer

Code:
#session {position: absolute;
top:expression(eval(document.compatMode &&
document.compatMode=='CSS1Compat') ?
documentElement.scrollTop : document.body.scrollTop);}
How do I make it so it starts 100px from the top of the page?

This is the link I got the code off of

http://www.gunlaug.no/contents/wd_additions_15.html

Thoughts?

Thanks,
Bryan