html5结合javascript实现简易音乐播放器

<div id="music">  <div id="container">   <h3 id="musicName">一月，银装轻舞-紫竹笛韵</h3>   <img src="image/一月，银装轻舞-紫竹笛韵.jpg" id="musicImg">   <audio src="./music/一月，银装轻舞-紫竹笛韵.mp3" controls id="audio"></audio>   <div class="btn">    <button id="play">play</button>    <button id="pause">pause</button>    <button id="prev">prev</button>    <button id="next">next</button>   </div>  </div> </div>

// 播放 play.onclick = function(){  if(audio.paused){   audio.play();  } }   // 暂停 pause.onclick = function(){  if(audio.played){   audio.pause();  } }

audio.addEventListener('ended',function(){  next.onclick(); },false);

// 上一首 prev.onclick = function(){  num = (num + len - 1) % len;  audio.src = './music/' + music[num] + '.mp3';  musicName.innerHTML = music[num];  bgImage.style.backgroundImage = 'url(./image/' + music[num] + '.jpg)';  musicImg.src = './image/' + music[num] + '.jpg';  audio.play(); }   // 下一首 next.onclick = function(){  num = (num + 1) % len;  audio.src = './music/' + music[num] + '.mp3';  musicName.innerHTML = music[num];  bgImage.style.backgroundImage = 'url(./image/' + music[num] + '.jpg)';  musicImg.src = './image/' + music[num] + '.jpg';  audio.play(); }

#music {  width: 500px;  height: 500px;  border-radius: 10px;  margin: 20px auto;  position: relative;  background: url(./image/一月，银装轻舞-紫竹笛韵.jpg) no-repeat;  background-size: cover;  text-align: center; } #container {  position: absolute;  left: 0;  right: 0;  top: 0;  bottom: 0;  width: 500px;  height: 500px;  text-align: center;  background:rgba(255,255,255,0.6); }