Can you use repeat when using the css 2.1 "content: url"?

I need to stretch an image across the entire background of a website regardless of resolution and screen size.  I came across the following article: http://nicolasgallagher.com/multiple-backgrounds-and-borders-with-css2/.  Here is the problem, if I go this route, can I use repeat when I use "content: url(.......)" like "content: url(........) repeat-x"?  If this is not the approach to use, could you please provide me with alternative approaches.  I have found several examples, but they seem to be rather complex.  any help would be greatly appreciated.  If this helps, it needs to be cross-browser.