Fluid Background Images

I have ended up chewing on the rug to figure out how to do a fluid background like the ones on Blogger -

I started with laying out 3 columns with colored backgrounds which worked fine, but there must be a better way of accomplishing this with images without resorting to overly huge ones?

Any help is greatly appreciated!:injured:

Hello

Please link to the Blogger site, and if possible to your own website, we now more or less have to guess what you actually want to do :)

As Ben said above we need more info to work with.:)

The blogger site doesn't seem to have a fluid background and just uses this image for the borders and main center column. Apart from that the rest is all straight forward coding and i can't see any fluid images or difficulties there.

Sorry I forgot the link-

http://kayolson-kayson.blogspot.com/