anchor.diff:  
   
         #header {
  -        background-image: url("assets/rails.png");
  +        background-image: url("/assets/rails.png");
           background-repeat: no-repeat;
           background-position: top left;
           height: 64px;
  
positive.code: 
          if (info.innerHTML === '') {
            xhr = new XMLHttpRequest();
            xhr.open("GET", "rails/info/properties", false);
            xhr.setRequestHeader("X-Requested-With", "XMLHttpRequest");
            xhr.send("");
            info.innerHTML = xhr.responseText;
  
negative.code:         </div>
  
          <div id="about">
            <h3><a href="/rails/info/properties" onclick="about(); return false">About your application&rsquo;s environment</a></h3>
            <div id="about-content" style="display: none"></div>
          </div>
  
  