function popup_photo(foto_id)
{
  var scroll = 'yes';
	var t = 0, l = 0;
w = 600;
h = 500;
t = 50; //t = Math.floor((screen.height - h) / 2 - 14);
l = 50; //l = Math.floor((screen.width - w) / 2);



  window.open('showphoto.php?foto_id=' + foto_id, 'popup' , 'resizable=no, scrollbars='+scroll+', width=' + w + ', height=' + h + ', top=' + t + ', left=' + l);
}