I'm trying to use backbone.js model.set property. The second alert function should fire off after todo1.set is being implemented. However it is not.

Here is the jsfiddle link: http://jsfiddle.net/SGEkn/

var Todo = Backbone.Model.extend({

        defaults: {

            title: Harsh,

            completed: false

        }, 

        initialize: function() {

            console.log('This model has been initialized.')

        }

    });



var todo2 = new Todo({

    title: 'Set through instantiation.',

    completed: true

});

console.log('Todo title: ' + todo2.get('title'));

console.log('Todo completed ' + todo2.get('completed'));



alert(ok);



todo2.set(title, 'Title set');



alert(ok);



console.log(todo2.get('title'));

todo.set(completed, false);



console.log('completed: ' + todo2.get('completed'));