音乐播放器播放时间用什么标签显示

贴一个来自 stackoverflow 的实现例子：

<audio id='audioTrack' ontimeupdate='updateTrackTime(this);'>
  Audio tag not supported in this browser</audio>
<script>
// 更新时间
function updateTrackTime(track){
  var currTimeDiv = document.getElementById('currentTime');
  var durationDiv = document.getElementById('duration');

  var currTime = Math.floor(track.currentTime).toString(); 
  var duration = Math.floor(track.duration).toString();

  currTimeDiv.innerHTML = formatSecondsAsTime(currTime);

  if (isNaN(duration)){
    durationDiv.innerHTML = '00:00';
  } 
  else{
    durationDiv.innerHTML = formatSecondsAsTime(duration);
  }
}
// 格式化时间
function formatSecondsAsTime(secs, format) {
  var hr  = Math.floor(secs / 3600);
  var min = Math.floor((secs - (hr * 3600))/60);
  var sec = Math.floor(secs - (hr * 3600) -  (min * 60));

  if (min < 10){ 
    min = "0" + min; 
  }
  if (sec < 10){ 
    sec  = "0" + sec;
  }

  return min + ':' + sec;
}
</script>

获取播放时间的API参考： HTML5 Audio 标准