title: How to add class to tr
body: <p>I need add a classs to "tr" prev with jquery in the next html</p>
  
  <pre><code>&lt;tr&gt;
      &lt;td&gt;content A&lt;/td&gt;
      &lt;td&gt;content B&lt;/td&gt;
      &lt;td&gt;conten N....&lt;/td&gt;
      &lt;td&gt;
          &lt;div class="radio radio-info"&gt;
              &lt;input type="radio" id="offer" class="ofer-sel" name="offerid" required="" value="10"&gt;
          &lt;/div&gt;
      &lt;/td&gt;
  &lt;/tr&gt;
  </code></pre>
  
  <p>how can I do this with jquery when the radio buttons is checked?</p>
  
  <p>regards!</p>