Poor man backbone layout manager

gistfile1.js

        _.extend(Backbone.View.prototype, {
            serialize: function () {},
            beforeRender: function () {},
            afterRender: function () {},
            render: function (where) {
                var tmp, that;

                this.beforeRender();

                // @note assume template always set with tpl property
                // @note assignment
                if ( !( tmp = window.app.templates[this.tpl] ) ){

                    that = this;

                    $.ajax({
                        url: 'src/app/templates/'+this.tpl,
                        async: false
                    }).done(function (res) {
                        tmp = res;
                        window.app.templates[that.tpl] = res;
                    });

                }

                this.el.innerHTML = _.template(tmp, this.serialize() )();

                where.appendChild(this.el);

                this.afterRender();
            }
        });