gistfile1.txt

<script type="text/javascript">
       $(function() {
           var API_KEY = '2132d453ab3cc055308fb40c708ea412';
           
           $(".set").each(function() {
               var set_id = $(this).find('a.flickr-set').attr('rel');
               url = 'http://api.flickr.com/services/rest/?method=flickr.photosets.getPhotos&api_key=' + API_KEY + '&per_page=48&page=1&format=json&jsoncallback=?&photoset_id=' + set_id;
               var selector = $(this);
               data = $.getJSON(url,
                      function(data, status, xhr) {
                          var counter = 0;
                          $.each(data.photoset.photo, function(i, item) {
                              photo_url = 'http://farm' + item.farm + '.static.flickr.com/' + item.server + '/' + item.id + '_' + item.secret;
                              small = photo_url + '_s.jpg';
                              large = photo_url + '_b.jpg';

                              element = $('<img class="thumbnail" style="display:inline;" src="'
                                      + small
                                      + '" />').hide();
                              selector.find('.img-container').append(element);
                              element.wrap('<a class="lightbox" style="display:inline;" href="' + large + '" rel="' + set_id +  '"></a>');
                              element.load(function() {
                                  counter ++; 
                                  if (counter == data.photoset.photo.length) {
                                      selector.find('img').fadeIn();
                                      selector.find('a.lightbox').fancybox();
                                  };
                              })
                          }); // end each
                      } // end callback function
                  ); // end json
                  /*
                  s	small square 75x75
                  t	thumbnail, 100 on longest side
                  m	small, 240 on longest side
                  -	medium, 500 on longest side
                  z	medium 640, 640 on longest side
                  b	large, 1024 on longest side*
                  */
           })
       });// end jquery
</script>

<div class="set">
    <h3>
        <a href="<!-- not relevant: it's just a link -->" class="flickr-set" rel="YOUR FLICKR SET ID HERE">Click Me</a>
    </h3>
    <div class="img-container"><!-- dynamically filled --></div>
</div>