public void remove(Track track) {
synchronized (this) {
docElt.removeChild(track.getElement());
tracks.remove(track);
hash.remove(track.getKey());
}
}
public void purge() {
for (int i = tracks.size() - 1; i >= 0; i--) {
Track track = (Track) tracks.elementAt(i);
if (track.isHidden()) tracks.remove(i);
}
}