noweOkienko = null;
function nowe_okno(src,w,h)
{
  if(noweOkienko==null || noweOkienko.closed)
  {
    ustawienia="left=50,top=50,width=" + w + ",height=" + h + ",toolbar=0,"
    +"location=0,directories=0,status=0,menubar=0,scrollbars=0,resizable=1"
    noweOkienko = window.open(src,"",ustawienia);
  }
}