title: How to selectively enable a Dropdown List
body: <p>I have a form containing two DropDowns lists:</p>
  
  <ol>
  <li>Marital Status</li>
  <li>No. of Children</li>
  </ol>
  
  <p>Now I would like to enable the No. of Children DropDown upon selection of following items in the Marital Status DropDown:</p>
  
  <ol>
  <li>Widow</li>
  <li>Divorced</li>
  <li>Awaiting Divorce</li>
  </ol>
  
  <p>How can I do it?</p>