CSS Shadow

What the best way to create a shadow effect around a table, I’ve seen this on http://www.shauninman.com/ I read other threads but is this done with a drop shadow pixel that runs down the side?? or is a Div filled w/ balck and low alpha, but how does the fade spread out?

If you could also post some links that you have found to be helpful, that would be great.

Cheers
pull_my_finger