DHTML Menu
We've got two solutions for creating DHTML menus: 
DHTML Menu library with Javascript and PHP API for programmers
and Art HTML Listing which is a Windows program
for automatic menu generation from a directory listing.
It is very easy to create professional-looking DHTML menu in just a couple of steps
with the help  Art HTML Listing.
The program has enough capabilities to make your DHTML menu functional and cool in any browser 
that supports DHTML / Javascript / DOM (for example, in Internet Explorer 6/5 and Firefox/Mozilla).
You don't need to have any programming skills in order to use it. 
Art HTML Listing can create several kinds of DHTML menu
from the directory listing:
  - Classic dropdown menu
 
  - Expanding - collapsing tree menu
 
  - Table of Contents menu
 
Screenshots:
  
    | Dropdown menu | 
    Expandable tree | 
    Table of Contents | 
  
  
      | 
      | 
      | 
  
Benefits
  - Simple as 1-2-3.
 
  - No programming skills required.
 
  - Instant professional-looking result.
 
  - Work in any DHTML/Javascript/DOM enabled browser, such as Internet Explorer 5+, Mozilla / Firefox.
 
  - Downgrades well. If browser doesn't support JavaScript or it is switched
    off, menu tree is still usable.
 
  - Fully customizable. Output is generated in accordance with templates. You
    can change everything in a template.
 
Live examples
Links