创建Audio对象

/**
 * Created by Administrator on 2015/8/4.
 */

function Coin(opts){
    this._init();
}
Coin.prototype={
    constructor:Coin,
    /**
     * 动画初始化方法
     * @method _init
     **/
    _init:function(){
        this._createAudio();
    },
    /**
     * 创建音频对象
     * @method _createAudio
     **/
    _createAudio:function(){
        this.audio=document.createElement('audio');
        this.audio.setAttribute("preload","load");
        var oSource=document.createElement('source');
        oSource.setAttribute("src","images/shake.mp3");
        oSource.setAttribute("type","audio/mp3");
        this.audio.appendChild(oSource);
        var oBody=document.getElementsByTagName('body')[0];
        oBody.appendChild(this.audio);
        this._playAudio();
    },
    /**
     * 播放音频
     * @method _playAudio
     **/
    _playAudio:function(){
        this.audio.play();
    },
    /**
     * 销毁canvas和audio
     * @method _destory
     **/
    _destory:function(){
        var oBody=document.getElementsByTagName('body')[0];
        oBody.removeChild(this.audio);
    }
}