Event trigger (this works with document.addEventListener)

gistfile1.txt

  function triggerEvent(element, eventType) {
    var e;

    if (document.createEventObject) {
      //ie
      e = document.createEventObject();
      element.fireEvent(eventType, e);
    } else {
      //others
      e = document.createEvent('HTMLEvents');
      e.initEvent(eventType, true, true);
      element.dispatchEvent(e);
    }
  }