anchor.diff:  
   <div id="map_holder" style="width:100%; height:100%">
     <div id="iframe_pan">
  -    <a href="#" id="iframe_tag_filter_link"><%= image_tag asset_path("pan.png") %></a>
  +    <a href="#" id="iframe_tag_filter_link"><%= image_tag asset_path("pan.png"), :class=>"pan" %></a>
     </div>
     <div id="map_canvas" style="width:100%; height:100%"></div>
   </div>
  
positive.code:       -webkit-box-shadow: 0px 0px 1px 1px #3168F5;
        box-shadow: 0px 0px 1px 1px #3168F5;
      }
  </style>
  <body>
  <script id="calloutTemplate" type="text/x-jsrender">
  
negative.code:         display:block;
          width: 24px;
          height: 24px;
          box-shadow: 0 0 5px #000;
          z-index:-10;
      }
      #infobox:before {
  