CSS Library: Vertical CSS Menus: Here
Bevel Vertical Menu
Author: Dynamic Drive (usage terms)
This CSS creates an "3 state" vertical menu out of an ordinary list. When the mouse moves over the menu, the menu item bevels up. Furthermore, in modern browsers such as Firefox (not IE6), clicking on the menu creates a depressed effect while the mouse is held down.
The bevel effect is painlessly created by using the border-style: outset attribute. There's no need to manually color the 4 borders of the menu item.