function openImage(uid_photo, width, height){
window.open("apercu-photo.php?uid_photo="+uid_photo, "photo", "width="+width+",height="+height+"menubar=no,scrollbars=no,resizable=yes");
}

function photoTrail(num_img, width, height){
window.open("photo-trail.php?numimg="+num_img, "trail"+num_img, "width="+width+",height="+height+"menubar=no,scrollbars=no,resizable=yes");
}