audio标签播放音频

<audio id="bgMusic" src="js/2.mp3" autoplay preload loop="loop"></audio>

<a class="play" id="audioBtn" style="cursor:pointer;" οnclick="autoPlay()"></a>
 <audio id="bgMusic" src="js/2.mp3" autoplay preload loop="loop"></audio>
 css
.pause {
             height: 50px;
             background: url(images/musicbtn.png) no-repeat;
             display: block;
             background-position: 0 bottom;
         }
 
         .play {
             height: 50px;
             background: url(images/musicbtn.png) no-repeat;
             display: block;
         }

 js
function autoPlay() {
             var myAuto = document.getElementById('bgMusic');
             var btn = document.getElementById('audioBtn');
             if (myAuto.paused) {
                 myAuto.play();
                 btn.classList.remove("pause");
                 btn.classList.add("play");
             } else {
                 myAuto.pause();
 
                 btn.classList.remove("play");
                 btn.classList.add("pause");
             }
 
         }
不过只有这个如果是移动端用到，iphone不会开启是自动播放需
<script type="text/javascript">
         function audioAutoPlay() {
             var audio = document.getElementById("bgMusic"),
             play = function () {
                 audio.play();
                 document.removeEventListener("touchstart", play, false);
             };
             audio.play();
             document.addEventListener("WeixinJSBridgeReady", function () {
                 play();
             }, false);
             document.addEventListener('YixinJSBridgeReady', function () {
                 play();
             }, false);
             document.addEventListener("touchstart", play, false);
         }
 </script>