jlThemeSwitcher is a jQuery theme switcher plugin I designed which allows you to switch between jQuery UI themes or your own custom themes created with jQuery UI Themeroller (http://jqueryui.com/themeroller/).
This widget has many helpful options and it automatically matches the selected theme.
Documentation, demo, and source code for the widget can be found at my website at http://jasonlau.biz/home/jquery/jlthemeswitcher-for-jquery.
Want to contribute to this project?
Send your jQuery UI themes to me to be added to the public themes list or send a request to become a co-developer.
You can also find some of my other jQuery plugins at my website.