code: function ( el, type, handler ) {
                  if ( _hasDomEvent ) {
                      this._removeEventListener = function ( el, type, handler ) {
                          el.removeEventListener( getCrossType(type), handler, false );
                      };
                  } else if ( _hasIEEvent ) {
                      this._removeEventListener = function ( el, type, handler ) {
                          el.detachEvent( 'on' + type, handler );
                      };
                  }
                  this._removeEventListener( el, type, handler );
              }
docs: removeEventListener 크로스브라우징 처리