Lightbox next/prev images don't show up

There's a lightbox but Previous/Next links do not show up. I've tried to play with z-index, removing 开发者_如何转开发:hover, etc., nothing seems to work. Am I missing something really obvious?

pictures itself are in the right place, and links do work, if you click at the right part of the image it takes you to the next one, etc., just pictures aren't shown

thanks in advance

If you need Previous/Next do not show up & work, you must change this code:

$(function() {
    $('#gallery a').lightBox();
});

to this:

$(function() {
    $('#gallery a').each(function(indx, element){
        $(element).lightBox();
    });
}); 

If you need Previous/Next only do not show up, you can use transparent picture for example.