版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/jquery.blockUI/2.70/jquery.blockUI.js
- https://cdn.bootcdn.net/ajax/libs/jquery.blockUI/2.70/jquery.blockUI.min.js
Simulate synchronous ajax by blocking - not locking - the UI. This plugin lets you block user interaction with the page or with a specific element on the page. Also great at displaying modal dialogs.