app.js

Titanium.UI.setBackgroundColor('#000');
var tabGroup = Titanium.UI.createTabGroup();
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
});

// My Code
Titanium.App.Properties.setString("description", null);
var row1 = Ti.UI.createTableViewRow();
var descriptionLabel = Titanium.UI.createLabel({
	color:'#B3B3B3',
	text:'Description (optional)',
	left:10,
	width:280,
	height:20
});

row1.add(descriptionLabel);
row1.hasChild = true;
row1.url = 'description.js';
row1.special = 'description';
var data = [];
data[0] = Ti.UI.createTableViewSection();
data[0].add(row1);

var view = Titanium.UI.createView();
var tv = Titanium.UI.createTableView({
	data:data,
	moving:false,
	style: Titanium.UI.iPhone.TableViewStyle.GROUPED
});
view.add(tv);

view.addEventListener('click', function(e) {
	if (e.rowData.url)
	{
		win = Titanium.UI.createWindow({
			url:e.rowData.url,
			backButtonTitle:'Cancel',
			title:'Description'
		});
		tab1.open(win,{animated:true});
	}
});

Titanium.App.addEventListener("descriptionChanged", function(e) {
	var text = e.text;
	if (text.length > 0) {
		descriptionLabel.text = text;
		descriptionLabel.color = '#000';
	} else {
		descriptionLabel.text = 'Description (optional)';
		descriptionLabel.color = '#B3B3B3';
	}
});



win1.add(view);
tabGroup.addTab(tab1);
tabGroup.open();

description.js

var view = Titanium.UI.createView();

var description = Titanium.UI.createTextArea({
	height:180,
	width:300,
	top:10,
	font:{fontSize:16},
	keyboardType:Titanium.UI.KEYBOARD_DEFAULT,
	returnKeyType:Titanium.UI.RETURNKEY_DEFAULT,
	borderWidth:1,
	borderColor:'#888',
	color:'#000',
	borderRadius:5
});
view.add(description);

var done = Titanium.UI.createButtonBar({
	labels:['Done'],
	backgroundColor:'#2463DE',
	style:Titanium.UI.iPhone.SystemButtonStyle.DONE
});
Titanium.UI.currentWindow.setRightNavButton(done);
done.addEventListener('click', function() {
	description.blur();
	Titanium.App.fireEvent("descriptionChanged", {
		text: description.value
	});
	
	Titanium.App.Properties.setString("description",description.value);
	Titanium.UI.currentWindow.close();
});


Titanium.UI.currentWindow.add(view);
if (Titanium.App.Properties.getString("description")) {
	description.value = Titanium.App.Properties.getString("description");
}

Titanium.UI.currentWindow.addEventListener('focus', function() {
	description.focus();
});