Is there is way to automatically switch the default template used in joomla based on the users browser? For instance, I am currently using Gantry framework for one of my websites, it would be a tonne of work to accommodate IE6, 7 and 8 into this framework, I was wondering if there's a script that will detect the users browser, say IE7, and if the user is using this browser Joomla automatically switches to a template that is compatible with that browser?