HTML5 Audio with playlists

HTML

<audio id="audio" preload="auto" tabindex="0" controls="" type="audio/mpeg">
    <source type="audio/mp3" src="http://www.archive.org/download/bolero_69/Bolero.mp3">Sorry, your browser does not support HTML5 audio.</audio>
<ul id="playlist">
    <li class="active"><a href="http://www.archive.org/download/bolero_69/Bolero.mp3">Ravel Bolero</a>

    </li>
    <li><a href="http://www.archive.org/download/MoonlightSonata_755/Beethoven-MoonlightSonata.mp3">Moonlight Sonata - Beethoven</a>

    </li>
    <li><a href="http://www.archive.org/download/CanonInD_261/CanoninD.mp3">Canon in D Pachabel</a>

    </li>
    <li><a href="http://www.archive.org/download/PatrikbkarlChamberSymph/PatrikbkarlChamberSymph_vbr_mp3.zip">patrikbkarl chamber symph</a>

    </li>
</ul>

CSS

#playlist, audio {
    background:#666;
    width:400px;
    padding:20px;
}
.active a {
    color:#5DB0E6;
    text-decoration:none;
}
li a {
    color:#eeeedd;
    background:#333;
    padding:5px;
    display:block;
}
li a:hover {
    text-decoration:none;
}

JavaScript

var audio;
var playlist;
var tracks;
var current;

init();

function init() {
    current = 0;
    audio = $('audio');
    playlist = $('#playlist');
    tracks = playlist.find('li a');
    len = tracks.length - 1;
    audio[0].volume = .10;
    playlist.find('a').click(function (e) {
        e.preventDefault();
        link = $(this);
        current = link.parent().index();
        run(link, audio[0]);
    });
    audio[0].addEventListener('ended', function (e) {
        current++;
        if (current == len) {
            current = 0;
            link = playlist.find('a')[0];
        } else {
            link = playlist.find('a')[current];
        }
        run($(link), audio[0]);
    });
}

function run(link, player) {
    player.src = link.attr('href');
    par = link.parent();
    par.addClass('active').siblings().removeClass('active');
    audio[0].load();
    audio[0].play();
}