* @desc ����ij��Ԫ�ص���Ԫ�ػ��Ԫ�� * @param cur {Element} ������Ԫ�� * @param dir {string } ���� 'previousSibling' or 'nextSibling' * @return {Element}
( cur, dir )
source not stored for this graph (policy: none)
no outgoing calls
no test coverage detected