Selectivizr

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.

Selectivizr adds support for 19 CSS3 pseudo-classes, 2 pseudo-elements and every attribute selector to older versions of IE. It can also fix a few of the browsers native selector implementations.

Selectivizr works automatically so you don’t need any JavaScript knowledge to use it — you won’t even have to modify your style sheets. Just start writing CSS3 selectors and they will work in IE.

Selectivizr requires a JavaScript library to work. If your website already uses one of the 7 supported libraries you just need to add the selectivizr script to your pages. If not, you will need to pick a library too.