title: element's z-index value can not overcome the iframe content's one
body: <p>I have a <code>div</code> and an <code>iframe</code> on the page
  the <code>div</code> has</p>
  
  <pre><code>z-index: 0;
  </code></pre>
  
  <p>the <code>iframe</code> has its content with a popup having a <code>z-index</code> of 1000</p>
  
  <pre><code>z-index: 1000;
  </code></pre>
  
  <p>However, the <code>div</code> still overshadows the popup in IE (but works fine in Firefox).</p>
  
  <p>Does anyone know what I can do?</p>