function changeHeight(iframe)
     {
        try
        {
          var innerDoc = (iframe.contentDocument) ? iframe.contentDocument : iframe.contentWindow.document;
          var objToResize = (iframe.style) ? iframe.style : iframe;
          objToResize.height = innerDoc.body.scrollHeight +40;
        }
        catch(err)
        {
          alert(err.message);
        }
      }