https://www.inkfrog.com/lib/js/retina.js
http://www.diva-dirt.com/wp-content/themes/hottopix/js/retina.js?76ecd9
http://www.anjolee.com/javascripts/retinanew.js
http://www.ingrammicrocloud.com/wp-content/themes/viral/js/retina.js
http://www.garethseoconsultant.co.uk/wp-content/themes/Bulldog/retina.js