var sounds = [];

// Return the full list of URLs in random order
function getSounds() {
    return [

var sounds = [];

// Return the full list of URLs in random order
function getSounds() {
    return [

'http://meme.gruwup.net/%23HereForYouNow/%23HereForNow-CommunityAddress%5b1-5%5d.mp3',
    'http://meme.gruwup.net/%23HereForYouNow/%23HereForNow-CommunityAddress%5b1-5%5d-%5bMusic%5d.mp3',
    'http://meme.gruwup.net/%23HereForYouNow/%23HereForNow-CommunityAddress%5b6-10%5d.mp3',
    'http://meme.gruwup.net/%23HereForYouNow/%23HereForNow-CommunityAddress%5bAll%5d-%5bMusic%5d.mp3',
    'http://meme.gruwup.net/%23HereForYouNow/Projecting%20Future%20Time%20Meeting%20Whenever.mp3',
    'http://meme.gruwup.net/%23HereForYouNow/911%20-%20Take%20Me%20Away!.mp3',
    'http://meme.gruwup.net/%23HereForYouNow/LinkedIn%20Post-Mpatapo%20Knot%20Binding.mp3',
    'http://meme.gruwup.net/%23HereForYouNow/Persuasive-Technology.mp3',
    'http://meme.gruwup.net/%23HereForYouNow/Marlon%20Riigs%20-%20Introduction%20To%20Standards.mp3',
    'http://meme.gruwup.net/%23HereForYouNow/Me%20the%20Sage-You%20the%20Fool-Katrina%20Where%20Wete%20You.mp3'

].sort(function () {
        // http://stackoverflow.com/a/18650169/283078
        return (.5 - Math.random());
    });
}

// Play the next sound
function playSound() {
    if (!sounds.length) {
        // Get the list of sounds (random order)
        sounds = getSounds();
    }

// Pops a URL every time, ensuring all are played exactly once
    $("#element").html(
        '<embed src="' + sounds.pop() +
        '" hidden="true" autostart="true" />'
    );

// Once all the URLs have been popped, the array is repopulated
}

$('#test').click(playSound);

JavaScript