Javascript

http://www.jtricks.com/javascript/navigation/floating.html

http://www.thesitewizard.com/archive/navigation.shtml
http://javascript.internet.com/navigation/one-click-multi-engine-search.html
http://www.jsmadeeasy.com/javascripts/Navigation/navigation_menu(dissolve)/navigation_menu(dissolve).htm
http://javascript.internet.com/navigation/menu-automatic.html
http://javascript.internet.com/navigation/portable-menu.html