How to add custom description to Galleria in Rails app?

Question

I am using Galleria (classic) and I can't get it to add custom description on images. Otherwise the gallery works fine, only I see the img file name in caption.

I'm trying to use the dataConfig function - http://galleria.io/docs/options/dataConfig/. I am not that good at JavaScript so I can't really see what I'm doing wrong.

My code:

 <div id="galleria">
   <% for image in @trip.images %>  
   <%= link_to image_tag(image.image.url(:thumb)), image.image.url(:large) %> 
 <span class="desc"> <%= image.title %>  </span>
   <% end %>
</div>
<script>

    Galleria.run('#galleria');
    Galleria.configure({
         minScaleRatio: 1.5,
         maxScaleRatio: 3,
         dataConfig: function(img) { return { description: $(img).next('.desc').html() }; }

   });

</script>
</div>

Can You please help ? Thank you!

Update: generated HTML code

 <div id="galleria">
   <a  href="http://s3.amazonaws.com/Thrill/images/439/large/14d8868ac166ce1.54701969.JPG?1326357617"><img alt="14d8868ac166ce1.54701969" src="http://s3.amazonaws.com/Thrill/images/439/thumb/14d8868ac166ce1.54701969.JPG?1326357617" /></a>  
   <span class="desc" style=""> aaaaaaaaaaaaaaa </span>
   <a href="http://s3.amazonaws.com/Thrill/images/440/large/14c77a671ced5e4.22721576.JPG?1326357627"><img alt="14c77a671ced5e4.22721576" src="http://s3.amazonaws.com/Thrill/images/440/thumb/14c77a671ced5e4.22721576.JPG?1326357627" /></a>   
   <span class="desc" style=""> bbbbbbbbbbbbbbbbbbbbbbbbb </span>
 </div>

Answer 1

It should work: http://jsfiddle.net/7g7am/

Galleria.run('#galleria', {
    dataConfig: function(img) {
        return {
            description: $(img).parent().next('.desc').html()
        };
    }
});
​