format time nicely

formatTime.js

/**
 * Utility for formating seconds into pretty time formats
 * @OUTPUT as follows: 0:01, 1:01, 10:01, 1:10:01
**/
function formatTime(seconds) {
  // video.duration returns NaN before loadedmetadata fires
  var seconds = isNaN(seconds) ? 0 : seconds.toFixed();
  var h = parseInt(seconds / 3600) % 24;
  var m = parseInt(seconds / 60) % 60;
  var s = seconds % 60;
  if (h < 1) {
    // under an hour
    return m + ':' + (s < 10 ? '0' + s : s);
  }
  // over an hour
  return h + ':' + (m < 10 ? '0' + m : m) + ':' + (s  < 10 ? '0' + s : s);
}