A way to make this plugin responsive

Hi
Are there any plans afoot or is there a way to make this plugin responsive to the area that its been applied? I have noticed some sites have this type of effect and the shadows resize as the browser is adjusted, as in here

http://www.jamieoliver.com/italian/guildford

Drop Shadow Boxes doesnt seem to do this, please correct me if im wrong

Thanks

Rob

http://wordpress.org/extend/plugins/drop-shadow-boxes/