How to implement a web page that scales when the browser window is resized?

Question

How to implement a web page that scales when the browser window is resized?

I can lay out the elements of the page using either a table or CSS float sections, but i

Answer 1

After trying a solution by the book I got stuck with incompatibility's in either Firefox or IE. So I did some tinkering and came up with this CSS. As you can see, the margins are half of the desired size and negative.

Hope that helps