function MP() {
  window.open('../images/mapa_piastow.gif', 'mapa', 'width=651,height=387,resizable=1,status=0,scrollbars=0');
}

function MW() {
  window.open('../images/mapa_wwa.gif', 'mapa', 'width=490,height=387,resizable=1,status=0,scrollbars=0');
}

function showPicturePopup(url, width, height) {
  max_width = 800;
  max_height = 800;
  width = (width <= max_width) ? width : max_width;
  height = (height <= max_height) ? height : max_height;
  window.open(url, 'full_view', 'width='+width+', height='+height+', resizable=1, status=0, scrollbars=1');
}