I’ve been using various UI libraries over the past couple of years and the thing that I’ve learned most is that it’s better to use them then try to re-invent the wheel. I personally like to use Yahoo’s open source platform called YUI. It’s a great library of tools that can be downloaded and installed on any directory. It makes for setting up pages and having great UI a snap. They have tons of pre-set configurations and you can do everything from menu-building, page-building, interfaces, pagination, and other various effects that can give a website sticky content. You can find YUI at http://developer.yahoo.com/yui.