Javascript なしに、CSS/DHTMLだけでメニューを作成
Pure CSS menus
http://www.howtocreate.co.uk/tutorials/testMenu.html
Pure CSS Menus
http://meyerweb.com/eric/css/edge/menus/demo.html
CSS / DHTML Hybrid Navigation Bar
http://www.brothercake.com/scripts/navmeister/page.php