anchor.diff:        position: relative;
         line-height: 0px;
         text-align: center;
  -      z-index: 99999;
  +      z-index: 666;
       }
       div#controls div.title {
         margin: 15px 0 0 0;
  
positive.code:     div#welcome {
        display: none;
      }
    </style>
  <% end %>
  
negative.code:     }
      div#controls {
        position: fixed;
        top: 37px;
        left: 0px;
        width: 244px;
        z-index: 666;
        opacity: 0.7;
        display: none;
        overflow-y: scroll;
  