Modernizr: CSS3/HTML5 cross-browser support. Is a script that helps older browsers to work almost as good as newest ones, so you can build modern applications that will work on IE6 and 7. Your clients will love it, that’s guaranteed. Taking advantage of the new capabilities of HTML5 and CSS3 can mean sacrificing control over the experience in older browsers. Modernizr 2 is your starting point for making the best websites and applications that work exactly right no matter what browser or device your visitors use.