code: function(e) {
              if (this.stopPropagation) {
                  YAHOO.util.Event.stopPropagation(e);
              }
  
              if (this.preventDefault) {
                  YAHOO.util.Event.preventDefault(e);
              }
          }
docs: Utility to stop event propagation and event default, if these
  features are turned on.
  @method stopEvent
  @param {Event} e the event as returned by this.getEvent()
  @static