How to display updated values in new window - titanium

Question

I'd like ask that when I input data into textarea, I cannot get the result in new window.
I mean, when I click the calculation button, the result displays NaN. I cannot handle how to do it. Code is below
Can anyone inform me please?
Titanium.UI.setBackgroundColor('white');
var win1 = Ti.UI.createWindow({
title : 'Welcome to BMI'
});
var win2 = Ti.UI.createWindow({
title:'BMI'
});
var win3 = Ti.UI.createWindow({
title:'BMI'
});
var win4 = Ti.UI.createWindow({
title:'BMI'
});
win4.addEventListener('open', function(e){
textAreaHeight.value/textAreaWeight.value;
});
var label1 = Ti.UI.createLabel({
top: 100,
text:'Welcome to BMI',
color : 'blue',
font: { fontSize:48 }
});
var standardButton = Ti.UI.createButton(
{
title:'Standart',
top : 250,
height:50,
width: 200
});
standardButton.addEventListener('click', function(e)
{
win1.close();
win2.open();
});
var metricButton = Ti.UI.createButton(
{
title:'Metric',
top : 350,
height: 50,
width: 200
});
metricButton.addEventListener('click', function(e)
{
win1.close();
win2.open();
});
var labelHeight = Ti.UI.createLabel({
text:'Height',
color:'red',
top:300,
left:100,
font: { fontSize:24 },
textAlign: Ti.UI.TEXT_ALIGNMENT_CENTER,
width: Ti.UI.SIZE, height: Ti.UI.SIZE
});
var HeightValue = Titanium.App.Properties.getInt("HeightValue");
var textAreaHeight = Ti.UI.createTextArea({
value : HeightValue,
borderWidth: 2,
borderColor: '#bbb',
borderRadius: 5,
color: '#888',
font: {fontSize:20,
fontWeight:'bold'},
left:200,
top: 300,
width: 125,
height : 40
});
textAreaHeight.addEventListener('click', function(e) {
textAreaHeight.blur();
Titanium.App.Properties.setInt("HeightValue", e.value);
});
var labelWeight = Ti.UI.createLabel({
text : "Weight",
color:'red',
top:400,
left:100,
font: { fontSize:24 },
textAlign: Ti.UI.TEXT_ALIGNMENT_CENTER,
width: Ti.UI.SIZE, height: Ti.UI.SIZE
});
var WeightValue = Titanium.App.Properties.getInt("WeightValue");
var textAreaWeight = Ti.UI.createTextArea({
value : WeightValue,
borderWidth: 2,
borderColor: '#bbb',
borderRadius: 5,
color: '#888',
font: {fontSize:20,
fontWeight:'bold'},
left:200,
top: 400,
width: 125,
height : 40
});
textAreaWeight.addEventListener('click', function(e) {
textAreaWeight.blur();
Titanium.App.Properties.setInt("WeightValue", e.value);
});
var CalculatorButton = Ti.UI.createButton({
title:'Calculate',
top:475,
width:400,
height:90,
left:75
});
CalculatorButton.addEventListener('click', function(e){
//alert(textAreaHeight.value);
//alert(textAreaWeight.value);
win2.close();
win4.open();
});
var BMILabel = Ti.UI.createLabel({
text:textAreaHeight.value/textAreaWeight.value,
font:{fontSize:84},
color:'red',
textAlign: Ti.UI.TEXT_ALIGNMENT_CENTER,
top:100
});
var ExitButton = Ti.UI.createButton({
title:'Exit',
top:475,
width:400,
height:90,
left:500
});
ExitButton.addEventListener('click', function(e)
{
win2.close();
win1.open();
});
win2.add(ExitButton);
win2.add(CalculatorButton);
//win2.add(BMILabel);
win2.add(labelHeight);
win2.add(textAreaHeight);
win2.add(labelWeight);
win2.add(textAreaWeight);
//win4.add(textAreabmi);
win4.add(BMILabel);
win1.add(standardButton);
win1.add(metricButton);
win1.add(label1);
win1.open();

Answer 1

Try this
CalculatorButton.addEventListener('click', function(e){
win4._myValue = textAreaWeight.value;
win4.open();
win2.close();
});
win4.addEventListener('open', function(e){
alert(win4._myValue);
});
Hope it helped you.