Focus an input field in a dialog

Focus an input field in a dialog

Hey all, I'm using jQuery UI v1.6rc2.  I'm trying to focus an input field in a dialog box when the dialog box is opened.  I've tried putting "$(idSel).focus()" inside my dialog open function, but it doesn't work.  I've had luck doing a setTimeout(), but that seems really kludgy.  I've tried adding in a focus function and doing it there, with no luck.  Anyone have an idea how to accomplish this? 

Thanks

Tim