CSS Library: Vertical CSS Menus: Here
Vertical CSS3 Shadow Menu
Author: Dynamic Drive
This CSS Menu uses CSS3's ability to define multiple/ inset shadows (so the shadow grows inwards) on an element to create menu items with a bevelled left edge and a growing inner glow when the mouse rolls over them. CSS3 animation is enabled to gradually transition between various property changes. When the mouse rolls over a menu item, 3 inner shadows of the same color but varying strengths and opacity are applied to it:
box-shadow: inset 7px 0 10px rgba(216,89,39, 0.4), inset 0 0 15px rgba(216,89,39, 0.6);
When defining multiple shadows, simply separate each one with a comma within the same border-shadow property.