jQuery Forum

You are correct. There is currently no support for theming a fieldset. We have a branch of development where theming support for more form controls is currently being worked on:

http://github.com/jquery/jquery-ui/tree/formcontrols

So far there has been some progress toward checkbox and radiobutton. There has been some discussion of styling text inputs and textareas. Fieldsets with legends are not trivial to style cross-browser, especially in IE. Not sure if anyone's tried with the jQuery UI CSS Framework yet.

Even though there's no demo for theming one now, you can apply theme colors to a fieldset (or any markup for that matter) by adding a CSS framework class like ui-widget-content to your element. This class will apply the theme's background colors/textures and font color. To apply the theme font family and size, just add the ui-widget class too.

Thanks! Its a fantastic framework and I look forward to seeing the new enhancements.

Dean