anchor.diff:  </div>
   
   <script type="text/javascript">
  -  var maps = <%= raw @maps.map { |card| present_card(card) }.to_json %>
  +  var maps = <%= raw @maps.map { |map| present_map(map) }.to_json %>
     var currentlyShowing = 0;
   
     $(document).ready(function () {
  
positive.code:       }
      }
  
      function loadSmallMap(card, index) {
        var sMURL = URLForDimensions(card.url, SMWidth, SMHeight);
  
        document.getElementById('sm-' + index).setAttribute('src', sMURL)
      }
  
negative.code: 
      }
  
      function loadBigMap(map) {
        var bMURL = URLForDimensions(map.url, BMWidth, BMHeight);
  
        document.getElementById('bm').setAttribute('src', bMURL)
        document.getElementById('title').innerHTML = map.title;
        document.getElementById('author').innerHTML = 'by ' + map.author;
      }
  
      function setupBigMap() {
  