[SOLVED] One background image behind the whole page

Greetings,

I love Atahualpa. Thanks for it.

How can a background image be placed behind the whole window (header, sides, center area, widgets, footer)?

Best would be, if the image could just stay there, covering the whole screen, and not moving, even when the visitor scrolls down to read...

With all I did the image is cut and repeated and in small bits behind the different elements...

Thanks a lot, Greeing,

Tamas