A heavy-table menu navigation can be replaced successfully by an unordered list formatted from css. With a little help of Javascript nested unordered lists can be quickly converted into drop-down menus. “Son of Suckerfish” (SoS) menu script, that you can find it here http://www.htmldog.com/articles/suckerfish/dropdowns/ is developed by Patrick Griffiths and Dan Webb. This is a very good example how good can JavaScript and CSS work togheter.