gistfile1.js

Titanium.UI.setBackgroundColor('#fff');  
var tabGroup = Titanium.UI.createTabGroup();  
  
var my_window = Titanium.UI.createWindow({  
    title:'This is my window',  
    url:'views/my_window.js'  
});  
  
var my_tab = Titanium.UI.createTab({  
    title:"Main Window",  
    window:my_window  
});  

tabGroup.addTab(my_tab);  
tabGroup.open();