s="btn btn-primary pull-left">Run</button>
            </nav>
         </div>
      </header>
      <div id="preferences" class="modal fade" tabindex="-1">
         <div class="modal-dialog">
            <div class="modal-content">
               <div class="modal-header">
                  <button type="button" class="close" data-dismiss="modal">×</button>
                  <h4 id="myModalLabel">Preferences</h4>
               </div>
               <div class="modal-body">
                  <form class="f