Sliding Doors of CSS, Part II: A List Apart : Sliding Doors of CSS (Part I) introduced a new technique for creating visually stunning interface elements with simple, text-based, semantic markup. In Part II, we’ll push the technique even further. If you haven’t read Part I yet, you should read it now.

Here, we’ll cover a new scenario where no tab is highlighted, combine Sliding Doors with a single-image rollover, provide a fix for the clickable region in IE/Win, and suggest an alternate method of targeting tabs. We’ll skip a basic recap of the technique (see Part I for this) in favor of jumping right back in where we left off.…

http://www.alistapart.com/articles/slidingdoors2/