Open New Window From Picker?

Hi there, I am developing an application at the moment and I am trying set up a picker in which users can select an option and it takes them to a page appropriate to their choice. However I am having trouble opening the selected page, can someone help!

Here is my code:

var picker = Ti.UI.createPicker();
 
var data = [];
data[0]=Ti.UI.createPickerRow({title:'Test1', url:'Test1.js'});
data[1]=Ti.UI.createPickerRow({title:'Test2', url:'Test2.js'});
 
picker.add(data);
 
picker.addEventListener('click',function(evt)
    {
            var window = Titanium.UI.createWindow({url:evt.row.url, backgroundColor:'#fff'});
 
            var button = Titanium.UI.createButton({title:'Back'});
 
            win.leftNavButton= button;
 
            button.addEventListener('click', function()
        {
            win.remove(window);
            win.leftNavButton = null;
 
        });
 
    });
 
win.add(picker);

Dont worry I got there myself!