Trouble using Titanium's webview to fire an API event

Question

I'm trying to fire an event from an external HTML page opened inside of Titanium's webview.

app.js file...

var group, now, tab, view, window;

now = new Date();
view = Titanium.UI.createWebView({url: 'http://MYWEBSITE.com/index.htm?time=' + now.getTime()});

window = Titanium.UI.createWindow({tabBarHidden: true, navBarHidden: true});
window.add(view);

Titanium.App.addEventListener('browse', function(e) {
    Ti.API.info("I received " + e.something + " from the webview.");
});

group = Titanium.UI.createTabGroup();
tab = Titanium.UI.createTab({title: 'window', window: window});
group.addTab(tab); 
group.open(tab);

js excerpt from web page...

$("#testButton").mousedown(function() {
    alert ("I got clicked.");
    Ti.App.fireEvent('browse', {something:'stuff'});
});

---

(I include the time in the URL to ensure the page is always fresh.)

Adding the event listener as shown above, or using view.addEventListener, compiles but ultimately doesn't work.

Using Titanium.UI.WebView.addEventListener produces an error message that the object doesn't exist.

Do I need to open the URL/webview in a different manner?

Also, since Titanium.App.fireEvent is not a recognized function, except to Titanium, how does one prevent a JavaScript error?

Thanks.