CSS-Tricks #7 Three State Menu

Using a variation of the CSS Sprites technique, we can create a “three state” menu using only one image per menu item. This reduces the number of requests on your server as well as eliminates any “pauses” while moving to a different state like some other techniques can have. This tutorial takes you all the way through the process of creating the images to the HTML to the CSS.

http://css-tricks.com/video-screencasts/7-three-state-menu/