I've created radio buttons with Struts2 tag and I know the simplest usage like: <s:radio id="radiobutton" name="myRadioButton" list="#{'1' : 'label1', '2' : 'label2', '3' : 'label3'}" but what I want is to add tips for each label which shows text when the mouse move over the radio buttons. How can I do it with Struts2?