yeah basically what everyone said. u cant have it for the same object, but u could just make another div over the background and have it spread over the whole page and give it a background.

but one thing is that in css i dont think the height: 100%; works, not on divs at least. so i dunno u could try and find some kind of workaround on it, or i guess just use a table cuz that does support 100% height.