How about JQuery for DOM stuff mixed with processing.js?
John Resig is the answer! ;D
Thanks for this tip bro! 
Glad to be of assistance. http://hascanvas.com is quite fun to play with to get an initial grasp of processing.js, though I can’t see me switching to a browser based IDE any time soon!
Also take a look at http://jquerymobile.com/ if you are looking into creating menulike “web pages”, - originally for mobile phones, but might also work great for you.
There’s also jqueryui, I wonder if that’s smart.