CSS Library: Horizontal CSS Menus: Here
Underline Horizontal Menu
Author: Dynamic Drive
This is a sleek CSS horizontal menu with a popular "underline" effect shown whenever the mouse rolls over a link. Each link (<a>) also carries a background image, used to as the indented line graphic that separates each menu item. We choose to use a graphic instead of CSS's dashed line effect, since it seems to look better.
The lone image (resized for easier download):