 id="box4">
      Lorem ipsum dolor sit amet, consectetur adipisicing elit, sed do eiusmod tempor incididunt ut labore et dolore magna aliqua.
    </div> <!-- #box4 -->
  </div> <!-- #box4_parent -->
</div> <!-- #box4_ancestor -->

<style type="text/css" media="screen">
  /* But when an _ancestor_ of an element has display: none, the situation
     is too complex for us to speculate. Instead, we'll return `0` for any
     height/width measurements. */
  #box4_ancestor {
    width: 600px;
  }
  
  #box4_pare