.bgAudio{width:27px;height:27px;position:fixed;right:10px;top:10px;z-index:999;-webkit-tap-highlight-color:rgba(0,0,0,0);outline:none;-webkit-transition:all 1s linear;transition:all 1s linear;-webkit-transform:translateZ(0);transform:translateZ(0);display:none}

			.bgAudio i{width:27px;height:27px;background:url(data:image/png;base64,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) no-repeat; background-size:27px 27px;display:block; position:relative; z-index:2}

			.bgAudio .icon_music{}

			@-webkit-keyframes audio-animation{

				from{-webkit-transform:rotate(0);}

				to{-webkit-transform:rotate(-360deg)}

			}

			.audioPlay i{-webkit-animation:audio-animation 1.2s linear infinite;animation:audio-animation 1.2s linear infinite;}

<a href="javascript:;" class="bgAudio" id="audio_ct">

			<i class="icon_music"></i>

			<em></em>

		</a>

 /* Audio类 momo 2015-01-30 */

    var mmAudio=function(aurl){

        if(!aurl){return;}

        var audio_ct=document.getElementById('audio_ct');

        this.audio=document.getElementById('audio');

        if(!this.audio){return;}

        this.audioCt=audio_ct||null;

        this.aurl=aurl;

        this.loadMusic();

    };

    //装载音频

    mmAudio.prototype.loadMusic=function(){

        var _this=this;

        _this.audio.src=this.aurl;

        _this.audio.volume=0.5;

        if(!_this.audioCt){return;}

        _this.audioCt.style.display='block';

        _this.audioCt.className='bgAudio audioPlay';

        /*ios默认暂停*/

        _this.isIphone();

        //绑定音频控制

        _this.audioCt.addEventListener('click',function(){

            this.className=='bgAudio'?_this.playMusic():_this.pauseMusic();

        },false);

    };

    //播放音频

    mmAudio.prototype.playMusic=function(){

        this.audio.play();

        this.audioCt.className='bgAudio audioPlay';

    };

    //暂停音频

    mmAudio.prototype.pauseMusic=function(){

        this.audio.pause();

        this.audioCt.className='bgAudio';

    };

    /*判断系统

     ios自动暂停

     ios 4隐藏

     */

    mmAudio.prototype.isIphone = function(){

        var sys = navigator.userAgent;

        if(sys.indexOf('iPhone')>-1){

            this.pauseMusic();

            if(window.screen.height<=480){this.audioCt.style.display='none';}

        }

    }

var music = new mmAudio('http://icon.xgo-img.com.cn/topic/music.mp3');