<script type="text/javascript">
        function createObject()
        {
            var object = new Object();

            object.username = "zhangsan";
            object.password = "123";

            object.get = function()
            {
                alert(this.username + ", " + this.password);
            };

            return object;
        }

        var object1 = createObject();
        var object2 = createObject();

        object1.get();
    </script>