function playPreview($track) {
    var so = new SWFObject("/resources/swf/web3/player.swf?s=" + $track, "cover", "1", "1", "7.0.0", "#FFFFFF");
    so.addParam("wmode", "opaque");
    so.addParam("scale", "noscale");
    so.write("previewPlayer");
}
function stopPreview() {
    document.getElementById("previewPlayer").innerHTML = "";
}