Backbone.Router for Meteor

router.js

// Router for Pages
Session.set("currentPage", null);
var SimpleRouter = Backbone.Router.extend({
    routes: {
        "":      "index",
        "signup": "signup"
    },
    index: function () {
        console.log("router : index")
        Session.set("currentPage", "index");
    },
    signup: function () {
        console.log("router : signup")
        Session.set("currentPage", "signup");
    }
});

var Router = new SimpleRouter;

Meteor.startup(function () {
  Backbone.history.start({pushState: true});
});