Edit in JSFiddle

var extendedRouter = Backbone.Router.extend({
    initialize: function () {
        this.route('help', 'help'); //will look for this.help (i.e. myRouter[help])
    },
    help:function(){ //will be an instance property
        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';