Maintaining Aspect ration in fullscreen

Not sure if here, or in the html forum was the place to ask, but there you go.

Basically, I want my .swf file to take up the most amount of space within the browser as possible, while retaining the aspect ratio.

If you look at http://www.videoemporium.co.uk

you’ll see what it’s doing right now, I’ve looked at a couple of how -tos but can’t see what I’m doing wrong.

If someone could look at the page source and give me some help that’d be supah-good!

Thanks in advance.