javascript namespacing

Calldirector.application.js

/// <reference path="..\jquery-1.6.1-vsdoc.js"/>
/// <reference path="..\Calldirector.base.js"/>

//javascript namespacing
var CallDirector_application = {};
(function () {

    //same as private
    var messageWindow;

    //same as public method
    this.messageWindow = function(msgWindow) {
        messageWindow = msgWindow;
    }

    //private
    var menuTree;
    var selectedNode;
    var selectedNodeId;

    //public method
    this.onLoad = function (e){
        menuTree = $(e.target).data('tTreeView');
    }

    this.onSelect = function (e) {
      selectedNodeId = menuTree.getItemValue(e.item);
      selectedNode = $(e.item).children('div');
    }

    var getFirstMenuItem = function (){
            var menuTreeDomElement = $(menuTree)[0].element;
            selectedNode = $(menuTreeDomElement).find('li.t-item').first();
            selectedNodeId = menuTree.getItemValue(selectedNode);
    }

    var $selectedMenuAction;
    this.selectedMenuActionId = function (id) {
        $selectedMenuAction = $('#' + id);
    }

    var $selectedMenuOption;
    this.selectedMenuOptionId = function (id) {
        $selectedMenuOption = $('#' + id);
    }

    var navigate = function (method) {
        if (!selectedNodeId) {
            selectedNodeId = getFirstMenuItem();
        }

        $selectedMenuOption.val(selectedNodeId);
        $selectedMenuAction.val(method);

        $('#btnSave').click();
    }

    this.newMenu = function () {
        if (!selectedNode) {
            getFirstMenuItem();
        }

        //if selectedNodeId is not sub-menu
        if ($(selectedNode).is(':has(span.icon-submenu)') == false) {
            messageWindow.center();
            messageWindow.open();
            return;
        }

       navigate('Create');
    }

    this.editMenu = function () {
        navigate('Edit');
    }

    this.deleteMenu = function () {
        navigate('Delete');
    }

    //the magic
}).apply(CallDirector_application);