Easy CSS Dropdown Menus
http://www.cssnewbie.com/easy-css-dropdown-menus/

Glazebrook, Rob L.
CSSnewbie
2008

Abstract:

Attractive dropdown menus have long been the realm of Flash developers and advanced JavaScript gurus. But that needn’t be the case. This tutorial will walk you through developing a clean, semantic dropdown menu using XHTML and CSS that works in all modern browsers!