I've rarely had much luck with theming the browser widgets beyond custom submit-buttons. There's always a browser not playing ball, always situations where the

I've rarely had much luck with theming the browser widgets beyond custom submit-buttons. There's always a browser not playing ball, always situations where the CSS magic interferes with the surrounding layout, always issues with dynamically generated or loaded content (unstyled by default unless you run the magic again on callback). All of the issues can be work-arounded. Been there, done that. Not recommended.