function openArtist(rel2root, img_root, sid, lang, artist)
{
  var fenster = window.open(rel2root+'artist_popup.php?sid='+sid+'&img_root='+img_root+'&lang='+lang+'&artist='+artist, 'artist','width=440,height=400,left=100,top=100,margin=0,scrollbars=1,location=0,menubar=0,resizable=1,status=0,toolbar=0');
}