JQuery不第二次使用动态音频播放列表

我希望能够从动态创建的文件夹（源）中播放类似于Reverb，Soudcloud的上传歌曲。这是一个带有以下生成的HTML源代码的Rails应用。

Brad Traversy的原始教程：https：//www.youtube.com/watch?v=wtwwx__O01M

问题只是第一个嵌套戏剧中最新的上传歌曲。其余的没有播放。我认为jQuery没有在随后的歌曲上工作，因为这些按钮不活动。请有什么帮助吗？编辑小提琴：http：//jsfiddle.net/91fgth2f/8/

var audio;
//Hide Pause Initially
$('#pause').hide();
$('#playlist').hide();

//Initializer - Play First Song
initAudio($('#playlist li:first-child'));
function initAudio(element) {
  var song = element.attr('song');
  var title = element.text();
  var cover = element.attr('cover');
  var artist = element.attr('artist');
  //Create a New Audio Object
  audio = new Audio('media/' + song);
  if (!audio.currentTime) {
    $('#duration').html('0.00');
  }
  $('#audio-player .title').text(title);
  $('#audio-player .artist').text(artist);
  //Insert Cover Image
  $('img.cover').attr('src', 'images/covers/' + cover);
  $('#playlist li').removeClass('active');
  element.addClass('active');
}

//Play Button
$('#play').click(function() {
  audio.play();
  $('#play').hide();
  $('#pause').show();
  $('#duration').fadeIn(400);
  showDuration();
});
//Pause Button
$('#pause').click(function() {
  audio.pause();
  $('#pause').hide();
  $('#play').show();
});
//Stop Button
$('#stop').click(function() {
  audio.pause();
  audio.currentTime = 0;
  $('#pause').hide();
  $('#play').show();
  $('#duration').fadeOut(400);
});
//Next Button
$('#next').click(function() {
  audio.pause();
  var next = $('#playlist li.active').next();
  if (next.length == 0) {
    next = $('#playlist li:first-child');
  }
  initAudio(next);
  audio.play();
  showDuration();
});
}

* {
  margin: 0;
  padding: 0;
  border: none;
  outline: none;
}
body {
  font-family: arial;
  font-size: 13px;
  line-height: 1.5em;
  color: #000000;
  background: url(../images/bg.png);
}
.clearfix {
  clear: both;
}
.hidden {
  display: none;
}
#container {
  width: 700px;
  height: 100px;
  background: #eee;
  overflow: auto;
  margin: 0px auto;
}
#audio-image {
  position: relative;
  overflow: hidden;
  height: 4px;
  margin-bottom: 1px;
}
#audio-info {
  text-align: center;
}
#audio-info .artist {
  font-weight: bold;
}
.cover {
  width: 100%;
  z-index: 1;
}
input#volume {
  width: 95%;
  margin-left: 2%;
  -webkit-appearance: none !important;
  background: #ccc;
  height: 1px;
  margin-bottom: -15px;
}
input#volume::-webkit-slider-thumb {
  -webkit-appearance: none !important;
  background: url(../images/knob.png) no-repeat;
  height: 12px;
  width: 12px;
}
#buttons {
  width: 95%;
  display: block;
  margin-top: -15px;
  margin-left: 23px;
  overflow: auto;
}
button#play {
  width: 24px;
  height: 22px;
  background: url(../images/play.png) no-repeat;
  float: left;
  margin-top: 15px;
}
button#pause {
  width: 24px;
  height: 22px;
  background: url(../images/pause.png) no-repeat;
  float: left;
  margin-top: 15px;
}
button#stop {
  width: 24px;
  height: 22px;
  background: url(../images/stop.png) no-repeat;
  float: left;
  margin-top: 15px;
}
button#prev {
  width: 24px;
  height: 22px;
  background: url(../images/prev.png) no-repeat;
  float: left;
  margin-top: 15px;
}
button#next {
  width: 24px;
  height: 22px;
  background: url(../images/next.png) no-repeat;
  float: auto;
  margin-top: 15px;
}
#playlist {
  list-style-type: none;
  padding: 2px;
}
#playlist li {
  cursor: pointer;
  margin: 5px;
}
#tracker {
  position: relative;
  width: 100%;
}
#playlist li.active {
  font-weight: bold;
  padding: 3px;
  background: #666;
}
#progressBar {
  width: 80%;
  margin-left: 2%;
  margin-bottom: 40px;
  margin-top: -10px;
  height: 5px;
  background: url(../images/progress_bg.png) no-repeat;
  float: right;
}
#progress {
  background: url(../images/progress.png) no-repeat;
  height: 5px;
  display: inline-block;
}
#duration {
  font-family: arial;
  font-size: 13px;
  line-height: 1.5em;
  color: #fff;
  position: absolute;
  margin-top: -25px;
  right: 10px;
  padding: 4px 8px;
  background: #000;
  border-radius: 5px;
}

<html>
  <table width="50%" border="0" cellspacing="0" cellpadding="0">
    <!---It plays for the songs within the first nested: <ul> </ul>-->
    <tr>
      <td align="left">
        <div class="buttons">
          <span>      
      <button id="play"></button>
     <button id="pause"></button>
      <button id="next"></button>
    </span>

          <ul id="playlist" class="hidden">
            <li song="song1.mp3" cover="cover1.jpg" artist="Artist1">Title.mp3</li>
            <!--- next song (song2.mp3) plays if added within this first nested: <ul> </ul> -->
            <li song="song2.mp3" cover="cover1.jpg" artist="Artist2">Title2.mp3</li>
          </ul>
        </div>
      </td>
    </tr>

调用问题 initAudio($('#playlist li:first-child'));

在上面的代码中，u传递了第一个li元素尝试更改诸如 initAudio($('#playlist li'));的代码。

希望这会起作用

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