I'm using CSS to add backgrounds to some TABLEs and TDs and know that they can be positioned using
background-position: 100px 20px; etc.
My questions is can a background image be positioned relative to the documents top-left position?
It's a bit tricky to give an example

but let's say that I want a background-image beind this message. Instead of having it's position relative to the top-left of this TD (which will be behind
I'm using CSS), the image is positioned relative to the top-left of the document (which will be just above and to the left of
PHP News somewhere).
Any help would be great on this one!
