Responsive design for all browsers and older versions of IE

If your task is to make your CSS media queries to work in most browsers and older versions of IE (7-8), all you need to do is to include Polyfills. Polyfills are js and you can download them from https://github.com/Modernizr/Modernizr/wiki/HTML5-Cross-Browser-Polyfills. I can recommend you Respond by Scott Jehl.