Edit in JSFiddle

//extend Backbone.Router()
var extendedRouter = Backbone.Router.extend({
    routes: {
        'help': 'help'
    },
    help: function () {
        console.log('The url hash just change to /#help');
    }
});

//create a Backbone Router
var myRouter = new extendedRouter();

//tell Backbone to start listening for changes in the URL
Backbone.history.start();

//change url hash to "#help"
window.location.hash = 'help';