Emulating a mobile screen size through an iframe

Question

Just a random thought, What if I wanted to showcase a responsive webdesign not by resizing the browser window, but actually loading the responsive site in an IFRAME having the s

Answer 1

I win :) There is one, well known, you can either use or learn from.

http://mattkersley.com/responsive/

To be more specific, iframe absolutely does allow you to change height and width and its content does respond to that - that is to say - @media works.