function ViewPhotos(cat,num) { 
  var win;
  window.open("photos.php?cat="+cat+"&photo="+num,"imageviewer","width=950,height=700,menubar=0,toolbar=0,scrollbars=1");
}

function showOnglet(onglet) {
  if (onglet!='langgb') document.all['langgb'].style.display='none';
  if (onglet!='langde') document.all['langde'].style.display='none';
  if (onglet!='langit') document.all['langit'].style.display='none';
  document.all[onglet].style.display='inline';
}