IE8 CSS Selector Support IE8 Supports the CSS2.1 selectors, including pseudoclasses but not pseudo elements. (See Double Colon Notation). IE8 has support for has support for Accessible Rich Internet Applications (ARIA) To force IE8 to render your page in IE8 compliance mode, include the following meta tag: <meta http-equiv="X-UA-Compatible" content="IE=8" /> IE7 within IE8 CSS Selector Support The