CSS Menus
Drop-Down Menus, Horizontal Style - by Nick Rigby (47 visits)
http://alistapart.com/articles/horizdropdowns
Hybrid CSS Dropdowns - by Eric Shepherd (44 visits)
http://alistapart.com/articles/hybrid
Suckerfish Dropdowns - by Patrick Griffiths, Dan Webb (47 visits)
http://www.alistapart.com/articles/dropdowns