function popup(url,jmeno,s,w,h) {
  posx=(screen.width-w)/2;
  posy=(screen.height-h)/2;
  window.open(url,jmeno,"resizable=yes,menubar=no,status=no,location=no,toolbar=no,scrollbars="+s+",width="+w+",height="+h+",top="+posy+",left="+posx);
}

function zavri(){
  window.opener.location.reload();
  window.close();
}