js 实现音频播放与暂停

html:

<script src="js/jquery-2.1.3.min.js"></script>
<div id="soundIconPlay" onclick="soundIconOff()"  class="soundIcon soundIconPlay"></div>
<div id="soundIconOff"  onclick="soundIconPlay()" class="soundIcon soundIconOff hide"></div>
<div class="audio" style="width:0; height:0px; overflow:hidden; text-indent:-999px;">
  <audio id="bgmusic" loop="loop" autoplay="autoplay" src="images/bgmusic.mp3" controls=true></audio>
</div> 
//关键： 先写页面再引js，否则会报Cannot read property 'pause/play' of null
<script type="text/javascript">
  function init() {
    var myAudio = document.getElementById("bgmusic");
     myAudio.addEventListener('ended', loopAudio, false);
  }
  function loopAudio() {
      var myAudio = document.getElementById("bgmusic");
      myAudio.play();
  }
 //加载页面播放背景音乐(ios无法实现，只能模拟触屏实现自动播放)
 function audioAutoPlay(id){  
      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);  
}  
audioAutoPlay('mybgaudio');  
</script>
<script type="text/javascript">
  var oAudioOFF = "1";
  var oAudio = document.getElementById('bgmusic');
  function soundIconPlay(){
　　　　oAudioOFF = "1";
　　　　oAudio.play();
　　　　$('#soundIconPlay').show();
　　　　$('#soundIconOff').hide(); 
   };
   function soundIconOff(){
　　　　oAudioOFF = "0";
　　　　oAudio.pause();
　　　　$('#soundIconPlay').hide();
　　　　$('#soundIconOff').show(); 
    };
</script>

css:

.soundIcon{
    position:absolute;
    top:.1rem;
    right:.1rem;
    z-index:1;
}
.soundIconPlay{
    width:.4rem;
    height:.4rem;
    background:url('../images/musicOn.png') no-repeat;
    background-size:100%;
    animation:bgRotate 1.2s infinite linear;
    -o-animation:bgRotate 1.2s infinite linear;
    -moz-animation:bgRotate 1.2s infinite linear;
    -webkit-animation:bgRotate 1.2s infinite linear
}
.soundIconOff{
    width:.4rem;
    height:.4rem;
    background:url('../images/musicOff.png') no-repeat;
    background-size:100%;
    animation:initial;
    -o-animation:initial;
    -moz-animation:initial;
    -webkit-animation:initial
}
@keyframes bgRotate{
    from{transform:rotate(0deg)}
    to{transform:rotate(360deg)}
}
@-webkit-keyframes bgRotate{
    from{-webkit-transform:rotate(0deg)}
    to{-webkit-transform:rotate(360deg)}
}
@-moz-keyframes bgRotate{
    from{-moz-transform:rotate(0deg)}
    to{-moz-transform:rotate(360deg)}
}
@-o-keyframes bgRotate{
    from{-o-transform:rotate(0deg)}
    to{-o-transform:rotate(360deg)}
}