This fails in NN4 and Macs.
This attempt is based on Tom Duffy's dhtml_pro article "Pop Goes the Menu" that appeared at DevX. Since it seems to be /asp archived, we cannot get a direct link so you'll have to search DevX for Duffy's articles.
This is basically CG215 classwork and not "real content." At this point, we cannot get the SubMenus to pop, or the Menus to hide (have to Refresh) ... plus a few other errors.