I'm trying to build a mobile application with PhoneGap, jQuery Mobile and Backbone.js on the client-side - with a Rails 3 JSON API running server-side. I know how to fetch the token from the server after being authenticated, but I don't know how to append the "token_auth" key/value to all the AJAX-requests Backbone.js will make to my server. Here's my flow at the moment: User types in some form fi