bootstrap 中dropmenu不起作用

今天在使用bootstrap发现dropmenu一直不起作用，代码是从官网拷贝过来。

网上查找可以用的页面进行一点点的去除分析，发现竟然是顺序反了导致的。

在使用dropmenu时需要引入jquery.js。而且引入的路径需要在boostrap.js前面。放在后面则不起作用

<script src="http://cdn.bootcss.com/jquery/1.11.1/jquery.min.js"></script>
<script src="http://cdn.bootcss.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>

　　

 <!DOCTYPE html>
 <html >
 <head>
 <title>what页</title>
 <meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
 <meta name="viewport" content="width=device-width, initial-scale=1, maximum-scale=1">
 <link href="resource/css/bootstrap.css" rel="stylesheet" type="text/css" rel="stylesheet"/>
 <link href="resource/css/what.css" rel="stylesheet" type="text/css" rel="stylesheet"/>

 <script src="http://cdn.bootcss.com/jquery/1.11.1/jquery.min.js"></script>
 <script src="http://cdn.bootcss.com/bootstrap/3.2.0/js/bootstrap.min.js"></script>

 </head>
 <body>
 <div class="navbar navbar-inverse navbar-fixed-top">
   <div class="container">
     <div class="navbar-header">
       <button class="navbar-toggle collapsed" type="button" data-toggle="collapse" data-target=".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 hidden-sm" href="http://www.bootcss.com">Bootstrap中文网</a> </div>
     <div class="navbar-collapse collapse" role="navigation">
       <ul class="nav navbar-nav">
         <li class="dropdown"> <a href="javascript:void(0)" class="dropdown-toggle" data-toggle="dropdown">Bootstrap2中文文档<b class="caret"></b></a>
           <ul class="dropdown-menu">
             <li> <a href="http://v2.bootcss.com/getting-started.html" target="_blank">起步</a> </li>
             <li> <a href="http://v2.bootcss.com/scaffolding.html" target="_blank">脚手架</a> </li>
             <li> <a href="http://v2.bootcss.com/base-css.html" target="_blank">基本CSS样式</a> </li>
             <li> <a href="http://v2.bootcss.com/components.html" target="_blank">组件</a> </li>
             <li> <a href="http://v2.bootcss.com/javascript.html" target="_blank">JavaScript插件</a> </li>
             <li> <a href="http://v2.bootcss.com/customize.html" target="_blank">定制</a> </li>
           </ul>
         </li>
         <li class="dropdown"> <a href="javascript:void(0)" class="dropdown-toggle" data-toggle="dropdown">Bootstrap3中文文档<b class="caret"></b></a>
           <ul class="dropdown-menu">
             <li> <a href="http://v3.bootcss.com/getting-started/" target="_blank">起步</a> </li>
             <li> <a href="http://v3.bootcss.com/css/" target="_blank">CSS</a> </li>
             <li> <a href="http://v3.bootcss.com/components/" target="_blank">组件</a> </li>
             <li> <a href="http://v3.bootcss.com/javascript/" target="_blank">JavaScript插件</a> </li>
             <li> <a href="http://v3.bootcss.com/customize/" target="_blank">定制</a> </li>
           </ul>
         </li>
         <li><a href="/p/lesscss/" target="_blank">Less 教程</a></li>
         <li><a href="http://jquery.bootcss.com/" target="_blank">jQuery API</a></li>
         <li><a href="http://expo.bootcss.com" target="_blank">网站实例</a></li>
       </ul>
       <ul class="nav navbar-nav navbar-right">
         <li><a href="/about/">关于</a></li>
       </ul>
     </div>
   </div>
 </div>

 </body>

运行测试