function jump(id,lang) {
  var w=790;
  var h=640;
  var winl = (screen.width-w)/2;
  var wint = (screen.height-h)/2;
  if (winl < 0) winl = 0;
  if (wint < 0) wint = 0;
ablak=window.open('termekinfo.php?id=' + id +'&lang='+lang, 'termek', 'scrollbars=1,resizable=1,toolbar=no,directories=no,menubar=no,status=no,location=no,width='+w+',height='+h+',top='+wint+',left='+winl)
ablak.focus()
}