title: Get ID value from set of radio buttons
body: <p>I'm trying to get the <strong>id</strong> of the set of radio buttons. Here is the HTML for it.</p>
  
  <pre><code>&lt;input id="1" type="radio" title="2" value="6/1/2010" name="vacationDay"&gt;
  &lt;input id="2" type="radio" title="2" value="6/2/2010" name="vacationDay"&gt;
  &lt;input id="3" type="radio" title="2" value="6/3/2010" name="vacationDay" checked='checked'&gt;
  </code></pre>
  
  <p>Here is my Javascript. </p>
  
  <pre><code>var updateDay = $('input[name=vacationDay]:checked').val();
  </code></pre>
  
  <p>It returns the value (6/3/2010) of the selected radio button . I would like to get the id of the checked button (3) as well.
  Ideas?</p>