title: Count TD number of different tables with same classes
body: <p>Let's say we have two tables with same classes, the only difference is the number of columns.</p>
  
  <pre><code>&lt;table class="lives prono_live"&gt;
      &lt;tr&gt;
          &lt;td&gt;1&lt;/td&gt;
          &lt;td&gt;2&lt;/td&gt;
          &lt;td&gt;3&lt;/td&gt;
          &lt;td&gt;4&lt;/td&gt;
      &lt;/tr&gt;
  &lt;/table&gt;
  
  &lt;table class="lives prono_live"&gt;
      &lt;tr&gt;
          &lt;td&gt;1&lt;/td&gt;
          &lt;td&gt;2&lt;/td&gt;
          &lt;td&gt;3&lt;/td&gt;
          &lt;td&gt;4&lt;/td&gt;
          &lt;td&gt;5&lt;/td&gt;           
      &lt;/tr&gt;
  &lt;/table&gt;
  </code></pre>
  
  <p>I want a jQuery function which gaves me each table's TD number in one loop.</p>
  
  <p>I created this code:</p>
  
  <pre><code>$( '.lives.prono_live' ).each(function( index ) {
      alert($('.lives.prono_live td').length);
  });
  </code></pre>
  
  <p>This code is not good, just partly. </p>
  
  <p>What this code does:</p>
  
  <ul>
  <li>Shows two alert box with the value 9 and 9 </li>
  </ul>
  
  <p>What I want to have: </p>
  
  <ul>
  <li>Shows two alert box with the value 4 and 5 </li>
  </ul>
  
  <p>Anyone knows how to do this ?</p>