Handy if you want a liquid layout for your Web site.

Quoted: The CSS used for this layout is 100% valid and hack free. To overcome Internet Explorer's broken box model, no horizontal padding or margins are used. Instead, this design uses percentage widths and clever relative positioning.
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The solution is to keep things simple and only use CSS that works in all browsers. One of the main things to avoid is horizontal margins, padding and borders on elements with a specified width. This causes big problems for Internet Explorer because of it's broken box model. Unfortunately we can't simply ignore IE because it's the most widely used browser on the internet. If only everyone used Firefox!