The basics are still the same although the suckerfish code has a few little problems in various old browsers. I have a demo here that tweaks things to work better.
The js is only needed for IE6 support.
There are some jquery plugins to add extra functionality to the menu (assuming that you are already using jquery for something else as you don’t want to load it for one thing).
Drop down menus are quite hard to use for accessibility reasons and if for instance your hand shakes or you have similar physical impairments it becomes impossible to navigate with the mouse because the cursor flicks off the target area and the menu disappears.
The jquery add ons can add a delay so that if you flick off the menu there is a delay which allows the mouse to be positioned back on the menu before it goes away. Some of the plugins also offer better keyboard input also.
It all depends on the menu but if fine control is needed then just remember that some users may struggle with it.
Thank you very much for the response and link Paul
May I just get some more information from you with regards to jquery? Would there be any disadvantages to adding these enhancements? I haven’t used it elsewhere