I tried an image 1280 x 1024 because that is my screen resolution, although I guess resolution wouldn't be the pixels. Don't know what I was thinking. Anyway, it wasn't big enough - it didn't cover the entire screen. And I am using the CSS Code that's suppose to make it cover the entire screen:
You could actually see that it was stacking the same image on top of each other - the last inch at the bottom of the screen was actually the top inch of the same image stacked below it.
So is there like a recommended image size that will cover all the screen sizes?