title: Selecting TD inside a table
body: <p>In jQuery, how to select ALL the TR that only has 2 TD inside?
  Here's the sample:</p>
  
  <pre><code>&lt;table&gt;
     &lt;tr&gt;
        &lt;td&gt;&lt;/td&gt;
     &lt;/tr&gt;          
     &lt;tr&gt; /* I only want to select this. */
        &lt;td&gt;&lt;/td&gt;
        &lt;td&gt;&lt;/td&gt;
     &lt;/tr&gt;
     &lt;tr&gt;
        &lt;td&gt;&lt;/td&gt;
     &lt;/tr&gt;
  &lt;/table&gt;
  </code></pre>