$("#music_btn").click(function(){
        var music = document.getElementById(‘music‘);
        if(music.paused){
            music.play();
            $("#music_btn").attr("src","images/play_music.png");//播放状态图片
            $(this).addClass("rotate");
        }else{
            music.pause();
            $("#music_btn").attr("src","images/close_music.png");//暂停状态图片
            $(this).removeClass("rotate");//控制图片是否转圈圈
        }
    });

#audio_btn.rotate img{
    animation: round 1.2s infinite ease-in-out;
    -webkit-animation: round 1.2s infinite linear;
}
@-webkit-keyframes round {
    0%{transform:rotate(0deg);}
    100% {transform:rotate(360deg);}
}
@-moz-keyframes round {
    0%{transform:rotate(0deg);}
    100% {transform:rotate(360deg);}
}
@keyframes round {
    0%{transform:rotate(0deg);}
    100% {transform:rotate(360deg);}
}