function otevriOkno(url, jmeno, w, h) {
  popupWin = window.open(url, jmeno, 'width=486,height=684,resizable=no,top=20,left=20,toolbar=no,menubar=0,location=no,scrollbars=no,directories=no,status=no');
}
function otevriOkno2(url, jmeno, w, h) {
  popupWin = window.open(url, jmeno, 'width=600,height=800,resizable=no,top=20,left=20,toolbar=no,menubar=0,location=no,scrollbars=no,directories=no,status=no');
}