if (window.ActiveXObject && !window.XMLHttpRequest)
{
  window.XMLHttpRequest = function()
    {
      try
      {
        return (new ActiveXObject('Msxml2.XMLHTTP'));
      }
      catch (e) {}

      try
      {
        retrurn (new ActiveXObject('Microsoft.XMLHTTP'));
      }
      catch (e) {}

      return (null);
    }
}