http://www.discogs.com/release/edit/xxxxxx
or
http://www.discogs.com/release/add

<input type="button" onclick="addArtistPerTrack();" value="Add Artist Per Track"/>
<input type="button" onclick="addExtraArtistPerTrack();" value="Add Extra Artist Per Track"/>

function addArtistPerTrack() {
    var node = $("tracks_header");
    while (node != null) {
        var id = new String(node.id);
        if (id.match(/^track(\d+)/)) {
            var tracknode = $("track" + RegExp.$1);
            if (!tracknode.innerHTML.match(/release.tracks.\d+.meta/)) {
                addTrackArtist(RegExp.$1);
            }
        }
        node = node.nextSibling;
    }
    setChanged();
}