css3-mediaqueries-js: make CSS3 Media Queries work in all browsers (JavaScript library) - Google Project Hosting
http://code.google.com/p/css3-mediaqueries-js
css3-mediaqueries.js by Wouter van der Graaf is a JavaScript library to make IE 5+, Firefox 1+ and Safari 2 transparently parse, test and apply CSS3 Media Queries. Firefox 3.5+, Opera 7+, Safari 3+ and Chrome already offer native support.