CSS Library: Horizontal CSS Menus: Here
CF Navigation Menu
Author: Dynamic Drive
This is CSS based navigational menu based on a single tab interface. The name "CF" is taken after our partner site CodingForums.com, which at the time of writing uses a menu based on this code. Four images are used as part of its interface- the two round corners, an indented divider between menu links, and a gradient background image spanning the menu.
In case you're wondering, this CSS menu retains its structure well when the text is resized.
The image used: