ms를 문자열로 포맷하기

function msToTime(ms) {
    var milliseconds = parseInt((ms%1000)/100)
        , seconds = parseInt((ms/1000)%60)
        , minutes = parseInt((ms/(1000*60))%60)
        , hours = parseInt((duration/(1000*60*60))%24);

    hours = (hours < 10) ? "0" + hours : hours;
    minutes = (minutes < 10) ? "0" + minutes : minutes;
    seconds = (seconds < 10) ? "0" + seconds : seconds;

    return hours + ":" + minutes + ":" + seconds + "." + milliseconds;
}

예시

msToTime(10000) // 00:00:10.0
msToTime(601000) // 00:01:01.0