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