ventana modal con sonido

function playSound() {
    var audioElement = document.createElement('audio');
    audioElement.setAttribute('src', '../sound/beep.mp3');
    audioElement.setAttribute('autoplay', 'autoplay');
    audioElement.addEventListener('onended', function() {
        this.currentTime = 0;
        this.play();
    }, false);
    audioElement.play();
}