The right way to create view

gistfile.js

var ContentView = BaseView.extend({
        tagName:'div',
        className: 'content',
        views: {
            "root": PickView,
            "heroes": HeroesView
        },
        onInitialize: function (params) {
            
            //reference to the current view
            this.currentView = undefined;
            
            BaseView.prototype.onInitialize.call(this, params);
            Backbone.on("change:page", this.changePage, this);
        },
        changePage: function(viewName){
            // safe removing of current view before adding new
            if(this.currentView)
              this.currentView.remove();
              
            //var view = new this.views[viewName]();
            //this.$el.html(view.render().el);
            
            // adding the new view
            this.currentView = new this.views[viewName]();
            this.$el.html(this.currentView.render().el);
        }
    });