JavaScript で秒や分を別の時間単位に変換する ref: http://qiita.com/shingorow/items/62eae5a87c85d1bcd0d2

file0.js

(function (global) {
  var TimeConvert = (function () {
    function TimeConvert() {}

    TimeConvert.prototype.sec2min = function (time) {
      var min = Math.floor(time / 60);
      var sec = time % 60;

      return {
        min: min,
        sec: sec
      }
    }

    TimeConvert.prototype.min2hour = function (time) {
      var hour = Math.floor(time / 60);
      var min = time % 60;

      return {
        hour: hour,
        min:min
      }
    }

    TimeConvert.prototype.sec2hour = function (time) {
      var sec = (time % 60) % 60;
      var min = Math.floor(time / 60) % 60;
      var hour = Math.floor(time / 3600);

      return {
        hour: hour,
        min: min,
        sec: sec
      }
    }

    return TimeConvert;
  })();

  global.TimeConvert = TimeConvert;
}(this));