// otevreni do noveho okna
function WinOpen(href, x , y) {
  if (window.WinOpen_tmp && !window.WinOpen_tmp.closed) 
    window.WinOpen_tmp.close();
  WinOpen_tmp = window.open(href,"WO","height="+y+",width="+x+",scrollbars=1,resizable=1");
  WinOpen_tmp.focus();
  return true;
}