1, EVENTS, logEvent);
    var z2 = new goog.ui.AnimatedZippy('header2', 'content2', true);
    goog.events.listen(z2, EVENTS, logEvent);
    var z3 = new goog.ui.AnimatedZippy('header3', 'content3', false);
    goog.events.listen(z3, EVENTS, logEvent);

    z1.expand();

    function zippyToggle(event) {
      z3.setExpanded(!event.expanded);
    }

    goog.events.listen(z2, goog.ui.Zippy.Events.TOGGLE, zippyToggle);
  </script>
</body>
</html>
