版本：
文件：
- https://cdn.bootcdn.net/ajax/libs/selectivizr/1.0.2/selectivizr-min.js
- https://cdn.bootcdn.net/ajax/libs/selectivizr/1.0.2/selectivizr.js
selectivizr is a JavaScript utility that emulates CSS3 pseudo-classes and attribute selectors in Internet Explorer 6-8. Simply include the script in your pages and selectivizr will do the rest.