Generating JavaScript menus on-the-fly

Hey - - -- - -- -- I keep a profile of a user's rights and responsibilities in tables. Since this profile defines what a user can do in the system I am designing, I'd like to build a JavaScript menu navigation scheme. I need it to be driven programmatically, because the Admin users can add and remove tasks to the system or to a given user at-will. I already built a similar thing using CSS-only menus, but it just wasn't aesthetically flexible enough. I am exploring other options, but I am wondering if any of you have done something similar and have any samples or advice. Ken