HTML5实现使用按钮控制背景音乐开关的方法

<audio id="music2" src="music.mp3"  loop="loop">你的浏览器不支持audio标签。</audio>    
<a href="javascript:playPause();">@@##@@</a>

function playPause() {    
    var music = document.getElementById('music2');    
    var music_btn = document.getElementById('music_btn2');    
    if (music.paused){    
        music.play();    
        music_btn.src = 'play.gif';    
    }    
    else{    
        music.pause();    
        music_btn.src = 'pause.gif';     
    }    
}   如果使用jQuery代码可以这样写：

<audio id="music" src="http://cctv3.qiniudn.com/zuixingfuderen.mp3" autoplay="autoplay" loop="loop">你的浏览器不支持audio标签。</audio>    
<a id="audio_btn">@@##@@</a>    
<script>    
$("#audio_btn").click(function(){    
    var music = document.getElementById("music");    
    if(music.paused){    
        music.play();    
        $("#music_btn").attr("src","play.gif");    
    }else{    
        music.pause();    
        $("#music_btn").attr("src","pause.gif");    
    }    
});    
</script>