CSS Library: Sliding Doors Tabs Menu

http://www.dynamicdrive.com/style/csslibrary/item/sliding-doors-tabs-menu/

This is a two state rollover tabs menu based on the popular sliding doors technique. It uses two images only, a right and left tab, with each image shifting up and down as the mouse moves over a tab. This ensures a flicker free experience in IE, though it also means the tab images themselves require a little more labor to create.