title: How to get checkbox inside table row cell
body: <p>I'm very noob in javascript.</p>
  
  <p>I'm trying to alert the id of a checkbox inside table view row cell.</p>
  
  <p>I tried:</p>
  
  <pre><code>var checkBox = grid.rows[i].cells[0].firstChild;
  alert(checkBox.id);
  </code></pre>
  
  <p>but the alert box shows "undefined".</p>