版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/flexisel/2.2.2/js/jquery.flexisel.js
- https://cdn.bootcdn.net/ajax/libs/flexisel/2.2.2/js/jquery.flexisel.min.js
- https://cdn.bootcdn.net/ajax/libs/flexisel/2.2.2/js/jquery.flexisel.min.js.map