function showImage( num )
{

window.open("popup.php?grupa="+num,
            "Podgląd",
            'menubar=no, toolbar=no, location=no,'+
            'directories=no, status=no, scrollbars=yes,'+
            'resizable=yes, fullscreen=no, channelmode=no,'+
            'width=600, height=570'
            ).focus();

}

function showOneImage( file )
{
  window.open("popup.php?file="+file,
              "Podgląd",
              'menubar=no, toolbar=no, location=no,'+
              'directories=no, status=no, scrollbars=yes,'+
              'resizable=yes, fullscreen=no, channelmode=no,'+
              'width=600, height=570'
  ).focus();
}