js时间戳转换成时分秒

       var  hours = parseInt((mss % (1000 * 60 * 60 * 24)) / (1000 * 60 * 60));
       var  minutes = parseInt((mss % (1000 * 60 * 60)) / (1000 * 60));
       var  seconds = (mss % (1000 * 60)) / 1000;