I've been unable to find a solution to the following 'teh interweb'. I have three sections: header, middle, footer. I want my header at the top op my screen, the footer at the bottom and I want the middle-part to fill up the rest. Now, here's the catch, I would like this to happen without having to set the height of the header and footer (so no set height in pixels, centimeters, percentages, whatever). Anyone have any idea?