title: When did Internet Explorer add support for the for..in loop in JavaScript?
body: <p>If I remember correctly, older versions of Internet Explorer didn't support <a href="http://msdn.microsoft.com/en-us/library/ie/55wb2d34%28v=vs.94%29.aspx" rel="nofollow">the <code>for..in</code> statement</a>.</p>
  
  <p>I've no idea which versions though, and it's not the easiest thing to Google.</p>
  
  <p>According to Microsoft, it's supported in Quirks Mode, and in standards mode from IE 6 onwards:</p>
  
  <ul>
  <li><a href="http://msdn.microsoft.com/en-us/library/ie/55wb2d34(v=vs.94).aspx" rel="nofollow">http://msdn.microsoft.com/en-us/library/ie/55wb2d34(v=vs.94).aspx</a> ("Requirements" section near the bottom)</li>
  </ul>
  
  <p>Which version of Internet Explorer added support for this?</p>