版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/jquery.selectbox/1.2.0/jquery.selectBox-arrow.gif
- https://cdn.bootcdn.net/ajax/libs/jquery.selectbox/1.2.0/jquery.selectBox.css
- https://cdn.bootcdn.net/ajax/libs/jquery.selectbox/1.2.0/jquery.selectBox.js
- https://cdn.bootcdn.net/ajax/libs/jquery.selectbox/1.2.0/jquery.selectBox.min.css
- https://cdn.bootcdn.net/ajax/libs/jquery.selectbox/1.2.0/jquery.selectBox.min.js