1、下載select2包 地址https://github.com/select2/select2/releases/tag/4.0.10
2、引入<link href="/css/select2.css"rel="stylesheet" />
3、引入jQuery.js和select2.js
<script type="text/javascript" src="/js/jquery-1.7.2.js"></script>
<script type="text/javascript" src="/js/select2.js"></script>
4、select標簽添加class屬性：class="multiSelect"
5、js代碼中加 $(".multiSelect").select2();即可