<div>    <h4 id="name">李玉剛 - 剛好遇見你</h4>  <br> <audio id="audio" src="F:/KuGou/李玉剛 - 剛好遇見你.mp3 " controls></audio><br/> </div> <br><br> <div> <button id="btn-play" >播放</button>  <button id="btn-stop" >暫停</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();     }   }  <!--暫停--> var btn2 = document.getElementById("btn-stop");   btn2.onclick = function(){      if(audio.played){                audio.pause();     }   }    var music = new Array(); music = ["李玉剛 - 剛好遇見你","張杰 - 三生三世","樸樹 - 平凡之路"];//歌單 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();   }