js 获取两个时间戳之间相隔多少天多少小时多少分多少秒

<script>
function getRemainderTime (startTime){
    var s1 = new Date(startTime.replace(/-/g, "/")),
    s2 = new Date(),
    runTime = parseInt((s2.getTime() - s1.getTime()) / 1000);
    var year = Math.floor(runTime / 86400 / 365);
    runTime = runTime % (86400 * 365);
    var month = Math.floor(runTime / 86400 / 30);
    runTime = runTime % (86400 * 30);
    var day = Math.floor(runTime / 86400);
    runTime = runTime % 86400;
    var hour = Math.floor(runTime / 3600);
    runTime = runTime % 3600;
    var minute = Math.floor(runTime / 60);
    runTime = runTime % 60;
    var second = runTime;
   // console.log(year,month,day,hour,minute,second);
　　return year+','+month+','+day+','+hour+','+minute+','+second;

}
//当前时间与2018-05-10的时间差
var startTime = "2018-05-10";
console.log(getRemainderTime(startTime));

</script>