source: Dev/trunk/src/client/dojox/app/tests/mediaQueryLayoutApp/views/centerNavigation.js

define(["dojo/dom", "dojo/dom-class"], function(dom, domClass){

        return {
                // view init
                init: function(){
                },
                
                beforeActivate: function(view, data){
                        // summary:
                        //              view life cycle beforeActivate()
                        //
                        this.previousView = view;
                        var backButtomDom = dom.byId('headerBackButton');
                        domClass.remove(backButtomDom, "showOnPhone");
                        domClass.add(backButtomDom, "hide");
                        
                        // setup code to watch for the navigation pane being visible
                        
                },

                beforeDeactivate: function(){
                        // summary:
                        //              view life cycle beforeActivate()
                        //
                        var backButtomDom = dom.byId('headerBackButton');
                        domClass.remove(backButtomDom, "hide");
                        domClass.add(backButtomDom, "showOnPhone");
                }
        }
});