JS+html5制作简单音乐播放器

<div>  
 <h4 id="name">李玉刚 - 刚好遇见你</h4> 
 <br> 
<audio id="audio" src="F:\KuGou\李玉刚 - 刚好遇见你.mp3 " controls></audio><br/> 
</div> 
<br><br> 
<div> 
<button id="btn-play" >播放</button> 
<button id="btn-s" >暂停</button> 
<button id="btn-pre" >上一首</button> 
<button id="btn-next" >下一首</button> 
</div> 
</div> 

var btn1 = document.getElementById("btn-play"); 
 btn1.onclick = function(){ 
   if(audio.paused){     
   audio.play(); 
  } 
 } 
 
<!--暂停--> 
var btn2 = document.getElementById("btn-s"); 
 btn2.onclick = function(){ 
   if(audio.played){     
   audio.pause(); 
  } 
 } 
  
var music = new Array(); 
music = ["李玉刚 - 刚好遇见你","张杰 - 三生三世","朴树 - 平凡之路"];//歌单 
var num = 0; 
var name = document.getElementById("name"); 
 
 
<!--上一首--> 
var btn3 = document.getElementById("btn-pre"); 
btn3.onclick = function(){ 
  num = (num +2)%3; 
  audio.src = "music/"+music[num]+".mp3"; 
  name.innerHTML = music[num]; 
  audio.play(); 
 } 
  
<!--下一首--> 
var btn4 = document.getElementById("btn-next"); 
btn4.onclick = function(){ 
  num = (num +1)%3; 
  audio.src = "music/"+music[num]+".mp3"; 
  name.innerHTML = music[num]; 
  audio.play(); 
 }