Transparent tables

I've seen people use these are their sites to display their information.. The transparent effect allows the viewer to see the background through the info table and I just can't seem to get it to work. here is an example of what I'm tryin to do. see the bckground through the menu screens? how can i do this?

http://www.deviantart.com/view.php?id=277999

this is the addy of the example I'm using. It didn't show up in my post.. Q me email me, doesn't matter, please help

All you need to do is adjust the transparency of the layer.

I've been playin with the transparency for 2 days....... is there a tutorial on this somewhere? I just can't get it right

I have no idea how to explain this though. 2 days?

Just set the layer transparency to 60% and save your image/export it as a web format(Save for web)