H5页面音频自动播放问题

(function() {
        var audio = document.getElementById(‘myAudio1‘);
        audio1 = audio;
        audio.src = source;
        audio.loop = true;
        audio.autoplay = true;
        audio.play();
        audio.addEventListener(‘canplay‘, canPlay, false);
    })();

(function() {
        var audio = document.createElement("AUDIO");
        audio2 = audio;
        audio.setAttribute("src", source);
        audio.setAttribute("loop", ‘true‘);
        audio.setAttribute("controls", ‘controls‘);
        audio.setAttribute("autoplay", ‘true‘);
        audio.setAttribute("id", ‘myAudio2‘);
        audio.addEventListener(‘canplay‘, canPlay, false);
        document.getElementById(‘example2‘).appendChild(audio);
        audio.play();
    })();

(function() {
        var audio = new Audio();
        audio3 = audio;
        audio.src = source;
        audio.loop = true;
        audio.id = ‘myAudio3‘;
        audio.autoplay = true;
        audio.addEventListener(‘canplay‘, canPlay, false);
        audio.play();
    })();

howler.js: http://goldfirestudios.com/blog/104/howler.js-Modern-Web-Audio-Javascript-Library
buzz.js: http://buzz.jaysalvat.com/
audio.js: http://kolber.github.io/audiojs/
jPlayer.js: http://jplayer.org/