// ovladani oken
function open(url, opt){
  if (opt == 0) // otevrit odkaz do tohoto okna
    window.location = url;
  else if (opt == 1) // otevrit odkaz do noveho okna
    window.open(url);
  else if (opt == 2) // otevrit odkaz na pozadi
    {window.open(url); self.focus();}
}
function selfWindow(url){
     window.location = url;
}