There's a good chrome extension I use called "Resolution Test" that does something similar: http://www.benbeckford.com/wordpress/2009/11/29/chrome-extension-re

There's a good chrome extension I use called "Resolution Test" that does something similar: http://www.benbeckford.com/wordpress/2009/11/29/chrome-extension-resolution-test/ http://www.benbeckford.com/wordpress/2009/11/29/chrome-exten...