app.js

// this sets the background color of the master UIView (when there are no windows/tab groups on it)
Titanium.UI.setBackgroundColor('#f00');

//create tab group
var tabGroup = Titanium.UI.createTabGroup();

//
// create base UI tab and root window
//
var win1 = Titanium.UI.createWindow({
	title:'Tab 1',
	backgroundColor:'#fff'
});

var tab1 = Titanium.UI.createTab({
	icon:'KS_nav_views.png',
	title:'Tab 1',
	window:win1
});

var label1 = Titanium.UI.createLabel({
	color:'#999',
	text:'I am Window 1',
	font:{fontSize:20,fontFamily:'Helvetica Neue'},
	textAlign:'center',
	width:'auto'
});
win1.add(label1);

//
// create controls tab and root window
//
var win2 = Titanium.UI.createWindow({
	title:'Tab 2',
	backgroundColor:'#fff'
});
var tab2 = Titanium.UI.createTab({
	icon:'KS_nav_ui.png',
	title:'Tab 2',
	window:win2
});

var label2 = Titanium.UI.createLabel({
	color:'#999',
	text:'I am Window 2',
	font:{fontSize:20,fontFamily:'Helvetica Neue'},
	textAlign:'center',
	width:'auto'
});
win2.add(label2);

//
//  add tabs
//
tabGroup.addTab(tab1);
tabGroup.addTab(tab2);

// open tab group
tabGroup.open();


var button = Ti.UI.createButton({
	title:'Close',
	top:100,
	height:30,
	width:60
});
win1.add(button);

var win3 = Ti.UI.createWindow({
	title:'Window 3',
	backgroundColor:'#0f0'
});

var label3 = Ti.UI.createLabel({
	color:'#999',
	text:'I am Window 3 (not tab)',
	font:{fontSize:20,fontFamily:'Helvetica Neue'},
	textAlign:'center',
	width:'auto'
});
win3.add(label3);

button.addEventListener('click', function(){
	win3.open();
	tabGroup.close();
//	tabGroup.open();
});