Navbar中的Bootstrap Dropdown插件

<nav class = "navbar navbar-default" role = "navigation">

   <div class = "navbar-header">
      <a class = "navbar-brand" href = "#">yiibai</a>
   </div>

   <div>
      <ul class = "nav navbar-nav">
         <li class = "active"><a href = "#">iOS</a></li>
         <li><a href = "#">SVN</a></li>

         <li class = "dropdown">
            <a href = "#" class = "dropdown-toggle" data-toggle = "dropdown">
               Java 
               <b class="caret"></b>
            </a>

            <ul class = "dropdown-menu">
               <li><a href = "#">jmeter</a></li>
               <li><a href = "#">EJB</a></li>
               <li><a href = "#">Jasper Report</a></li>

               <li class = "divider"></li>
               <li><a href = "#">Separated link</a></li>

               <li class = "divider"></li>
               <li><a href = "#">One more separated link</a></li>
            </ul>

         </li>
      </ul>
   </div>

</nav>