Bootstrap响应导航栏

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

   <div class = "navbar-header">
      <button type = "button" class = "navbar-toggle" 
         data-toggle = "collapse" data-target = "#example-navbar-collapse">
         <span class = "sr-only">Toggle navigation</span>
         <span class = "icon-bar"></span>
         <span class = "icon-bar"></span>
         <span class = "icon-bar"></span>
      </button>

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

   <div class = "collapse navbar-collapse" ID = "example-navbar-collapse">

      <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>