// ----- otevre obrazek -----
    function OpenImage(img_file)
    {
      page   = "open_file.php?type=img&open_file="+img_file;
      my_win = window.open(page,"show_image","height=480,width=640,scrollbars=no,status=no,toolbar=no,menubar=no,location=no,resizable=yes");
      my_win.focus();
    }

  // ----- otevre soubor -----
    function OpenFile(download_file)
    {
      page   = download_file;
      my_win = window.open(page,"download_file","height=480,width=640,scrollbars=no,status=no,toolbar=no,menubar=no,location=no,resizable=yes");
      my_win.focus();
    }

  // ----- otevre odkaz pro do okna pro tisk -----
    function OpenPrintPage(ppage)
    {
      my_win = window.open(ppage,"_print_","width=650,scrollbars=yes,status=no,toolbar=no,menubar=yes,location=no,resizable=yes");
      my_win.focus();
    }