code: function removeEvent(node, event, fn, opt_useCapture) {
          if (typeof node.removeEventListener == 'function') {
              node.removeEventListener(event, fn, opt_useCapture || false);
          }
          else if (typeof node.detatchEvent == 'function') {
              node.detatchEvent('on' + event, fn);
          }
      }
docs: Removes a previously added event handler from a DOM node.
  @param {Node} node The DOM node to remove the event handler from.
  @param {string} event The event name.
  @param {Function} fn The event handler to remove.
  @param {boolean} opt_useCapture If the event handler was added with this
  flag set to true, it should be set to true here in order to remove it.