CSS Library: Horizontal CSS Menus: Here
Inverted Shift Down Menu
Author: Dynamic Drive
This clean CSS horizontal menu contains tabs with text that shift downwards slightly when the mouse rolls over it. And just for demonstration, it shows how to make the bottom corners of each tab rounded using both CSS3 and Mozilla's proprietary declarations for rounded corners. Note that the rounded corners effect is currently only visible in Firefox (and future CSS3 browsers). The relevant lines within the CSS code are:
-moz-border-radius-bottomleft: 5px; border-bottom-left-radius: 5px; -moz-border-radius-bottomright: 5px; border-bottom-right-radius: 5px;
Remove these lines if you're aiming for a consistent look across browsers.