Scaling Images with CSS when you´re creating and controlling a RWD page is an extreme time save. It sure as heck beats swapping out whatever image is right for the phone verses the big screen television.
There are many different uses for Scaling Images with CSS in RWD. In this video, we scale a regular image in a div as well as a background image in a div.
Once again, I´ve zipped up the html, css and image files so that you can download and experiment with the concepts.