引入js文件

<script src="js/jquery-1.11.0.min.js" type="text/javascript"></script>
<script src="http://cdn.bootcss.com/bootstrap/3.3.7/js/bootstrap.min.js"></script>
<script src="js/bootstrap-select.min.js"></script>
<script src="js/countrypicker.min.js"></script>