I have been writing my own Lightbox script (to learn more about jQuery).

My code for the captions are as follows (the problem is that the captions are the same on every image):

close.click(function(c) {
    c.preventDefault();
    if (hideScrollbars == "1") {
        $('body').css({'overflow' : 'auto'}); 
    }
    overlay.add(container).fadeOut('normal');
    $('#caption').animate({ 
        opacity: 0.0
        }, "5000", function() {
            $('div').remove('#caption'); 
        });
    });

  $(prev.add(next)).click(function(c) {
    c.preventDefault();
    $('div').remove('#caption') 
    areThereAlts = "";
    var current = parseInt(links.filter('.selected').attr('lb-position'),10);
    var to = $(this).is('.prev') ? links.eq(current - 1) : links.eq(current + 1);
    if(!to.size()) {
      to = $(this).is('.prev') ? links.eq(links.size() - 1) : links.eq(0);
    }
    if(to.size()) {
      to.click();
    }
  });