版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/jquery-bgiframe/3.0.1/jquery.bgiframe.js
- https://cdn.bootcdn.net/ajax/libs/jquery-bgiframe/3.0.1/jquery.bgiframe.min.js
- https://cdn.bootcdn.net/ajax/libs/jquery-bgiframe/3.0.1/jquery.bgiframe.min.js.map