Sample of iOS/MobileWeb NavigationGroup.

app.js

/**
 * Sample app.js to demonstrate cross-platform NavigationGroup on iOS & MobileWeb.
 */

var mainWin = Ti.UI.createWindow();

var win2 = Ti.UI.createWindow({
	exitOnClose : true,
	backgroundColor : '#a68',
	title : 'Window2',
	layout : 'vertical'
});
var textField = Ti.UI.createTextField({
	top : 40, left : 10, width : 300, height : 40,
	hintText : '...',
	borderStyle : Ti.UI.INPUT_BORDERSTYLE_ROUNDED
});
win2.add(textField);
var win1 = Ti.UI.createWindow({
	exitOnClose : true,
	backgroundColor : '#6a8',
	title : 'Window1'
});
var button = Ti.UI.createButton({
	height : 40,
	width : 100,
	top: 40,
	title : 'Next'
});
button.addEventListener('click', function(e) {
	navGroup.open(win2);
});
win1.add(button);

var navGroup;
if (Ti.Platform.osname === 'iphone') {
	navGroup = Ti.UI.iPhone.createNavigationGroup({
		window : win1
	});
} else {
	navGroup = Ti.UI.MobileWeb.createNavigationGroup({
		window : win1
	});
}
mainWin.add(navGroup);

mainWin.open();