版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/jquery.collapsible/1.2/jquery.collapsible.js
- https://cdn.bootcdn.net/ajax/libs/jquery.collapsible/1.2/jquery.collapsible.min.js
This plugin enables site owners to control multiple collapsible panels by auto opening any defaults specified, and keeping those opened/closed by users as they left them while browsing your site.