Custom Navigation Controller, compatible with Android and iPhone

customnav.js

// Flags, is this for Android or iPhone?
var iPhone = false;
var Android = false;
if(Ti.Platform.osname == 'iphone'){
	iPhone = true
};
if(Ti.Platform.osname == 'android'){
	Android = true
};

// our navigation function, to be compatible with both platforms
function NavigationController(a){
	// this is to avoid errors
	a = a || {};
	a.window = a.window || Ti.UI.createWindow();
	// this is to handle the iPhone Nav functionality
	if(iPhone){
		var win = Ti.UI.createWindow();
		var nav = Ti.UI.iPhone.createNavigationGroup({
		   window: a.window
		});
		win.add(nav);
		win.push = function(b){
			nav.open(b);
		};
		return win;
	}
	// there is no Nav in Android, so let's return the window
	if(Android){
		a.window.push = function(b){
			b.open({
				fullscreen:false
			});
		}
		return a.window;
	}
}

// start the app right here
var win = Ti.UI.createWindow({
	backgroundColor:'green'
});

var btn = Ti.UI.createButton({
	title:'push next window to the stack',
	width:300,
	height:50
});

win.add(btn);

// let's call our custom navigation function
var navigation = NavigationController({
	window:win
});
// open it
navigation.open();

// example of how to push (or open) the next window
btn.addEventListener('click', function(){
	var win2 = Ti.UI.createWindow({
		backgroundColor:'red'
	});
	navigation.push(win2);
});