You can look at the following for some ideas :

http://www.webreference.com - look for Hiermenu
http://dhtmlnirvana.com/alchemy/showhide.htm

At 17:04 09/02/02 +0000, you wrote:
>I'm trying to make a menu with expanding sub-menus. My app. works fine in
>Internet Explorer and Opera, but fails to expand the menu(s) in Netscape.
>I've tried re-adjusting the script so that the Style "Visibility:"
>parameter is set to either Show or Hide (rather than Visible or Hidden).
>
>However, this failed to solve the problem, so I entered an alert() in the
>script I wanted to run (just to see if the script was being called). But
>no! In MSIE and Opera, the alert appears, in NN6 it doesn't. This leads me
>to believe that the onMouseOver and onMouseOut events are even being
>triggered, and this seems very strange.
>
>Can anyone help me out here? Is there anything that I've overlooked or am
>missing?
>
>Thanks in advance!
>Charles Lyons.