添加背景音樂（解決蘋果手機不能自動播放問題）

　　function myPlay(){
        var audio = document.getElementById('Jaudio'),
            play = function(){
                audio.play();
                document.removeEventListener("touchstart",play, false);
            };
        audio.play();
        document.addEventListener("WeixinJSBridgeReady", function () {//微信
            play();
        }, false);
        document.addEventListener('YixinJSBridgeReady', function() {//易信
            play();
        }, false);
        document.addEventListener("touchstart",play, false);
    }