title: How to select a row with particular class name in JQuery
body: <p>I have a table as follows </p>
  
  <pre><code>&lt;table&gt;
      &lt;tr&gt;
          &lt;td id="start"&gt;Starting Point&lt;input type="button" value="start the test" onclick="get_the_next()" /&gt;&lt;/td&gt;
      &lt;/tr&gt;
      &lt;tr&gt;
          &lt;td&gt;not the right class - skip me&lt;/td&gt;
      &lt;/tr&gt;
      &lt;tr class="concept1"&gt;
          &lt;td&gt;get me if you can!&lt;/td&gt;
      &lt;/tr&gt;
      &lt;tr class="concept2"&gt;
          &lt;td&gt;but not me, I'm not the next&lt;/td&gt;
      &lt;/tr&gt;
      &lt;tr&gt;
          &lt;td&gt;not the right class - skip me&lt;/td&gt;
      &lt;/tr&gt;
  &lt;/table&gt;
  </code></pre>
  
  <p>I need to select row with class name "concept2". How can I do that in JQuery?</p>