PIE (Progressive Internet Explorer) is an IE attached behavior that allows IE 6-8 to recognize and display a number of CSS3 properties. It currently has full or partial support for the following CSS3 features: border-radius, box-shadow, border-image, multiple background images, and linear-gradient as background image.
Using PIE in your projects is really simple and straight forward. All you need to do is upload “htc” file on the server and add the behavior in CSS rule of the element: “behavior: url(path/to/PIE.htc);”. You need to make sure that path is relative to the HTML file being viewed, not the CSS file it is called from.
Developed by Jason Johnston; PIE (Progressive Internet Explorer) is Available for download under Apache License Version 2.0. You can find further information, demos & download on PIE (Progressive Internet Explorer) Website.