I want to use the extension ".fjs". When a user "wants.js" in a
respond_to block I would first like to look for a .fjs file and render
it with my new templating system. If an .fjs file is not present then
look for .rjs file and render with the rjs templating system.
Is this easily possible through the Rails API or is this going to be
hacking the Rails core?
Any pointers how to do this or get started would be greatly appreciated.