-visible/modifiable.
  See <a href="history2.html#came from history 1">history2.html</a> for a demo.
  To see visible/modifiable history work when the goog.History code itself is
  loaded inside a hidden iframe,
  see <a href="history3.html#came from history 1">history3.html</a>.
  </p>

  <fieldset class="goog-debug-panel">
    <legend>Event Log</legend>
    <div id="log"></div>
  </fieldset>

  <script>
  var logger = goog.log.getLogger('demo');
  var logconsole = new goog.debug.DivConsole(goog.dom.getEle