<!DOCTYPE html> <html> <head lang="en"> <meta charset="UTF-8"> <title></title> <link href="http://cdn.bootcss.com/bootstrap/3.3.5/css/bootstrap.min.css" rel="stylesheet"> </head> <body> <div class="dropdown"> <button class="btn btn-primary dropdown-toggle" type="button" id="dropdownMenu1" data-toggle="dropdown">下拉菜单<span class="caret"></span> </button> <ul class="dropdown-menu"> <li><a href="#">选项1</a></li> <li><a href="#">选项2</a></li> <li><a href="#">选项3</a></li> <li class="divider"></li> <li><a href="#">选项4</a></li> </ul> </div> <script src="http://cdn.bootcss.com/jquery/2.1.4/jquery.min.js"></script> <script src="http://cdn.bootcss.com/bootstrap/3.3.5/js/bootstrap.min.js"></script> </body> </html>
原文：http://my.oschina.net/iNiL0119/blog/485684