// set up communicaiton between webview and window
app.js
------------
var win3 = Ti.UI.createWindow({
        id: 'win3'
    }),
    preview = Ti.UI.createWebView({
        url: 'preview.html',
        height: 'auto'
    }),
    labelTitle = Ti.UI.createLabel({
        title: 'Title not set'
    }),
    labelSubTitle = Ti.UI.createLabel({
        title: 'Subtitle not set'
    });

tabGroup.addEventListener('focus', function() {
  labelTitle.title = inputTitle.value || 'Title not set';
  labelSubTitle.title = inputSubTitle.value || 'Subtitle not set';

  Ti.App.fireEvent('tiToWeb', {
    'pic': photo,
    'picUrl' : photoPath,
    'title': labelTitle.title,
    'subTitle': labelSubTitle.title
  });

  inputTitle.blur();
  inputSubTitle.blur();
});

win3.add(preview);


preview.html
--------------
Ti.App.addEventListener('tiToWeb', function(data) {
  $('img').attr('src', data.picUrl);
  $('#poster-title').text(data.title);
  $('#poster-subtitle').text(data.subTitle);
});