anchor.diff:      </div>
     </nav>
   
  -</head>
  -
  -<body>
  -
   
     <div class="jumbotron" id="Home">
       <div class="container-fluid">
  
positive.code: <head>
  
    <nav class="navbar navbar-default navbar-fixed-top shadow" id="topnav">
      <div class="container-fluid">
  
negative.code: 
          </div>
        </div>
      </div>