CSS fixed positioning

I've had a hard day trying to get IE6 to place a footer at the bottom of the window, no matter what content is above it. Eventually found somewhere that the following has to go at the end of the style-sheet. I'm still stuck with non-scrolling content, but that may not matter in this case.

html
{
    overflow: hidden;
}

body
{
    height: 100%;
    overflow: auto;
}