Untitled

app.js:

var win = Ti.UI.createWindow({
    title: "Test",
    navBarHidden: false
});

var view = Ti.UI.createWebView({
    url: "test.html"
});

win.add(view);

win.addEventListener('open', function(e) {
    win.activity.invalidateOptionsMenu();
    var actionBar = win.activity.actionBar;
    actionBar.title = win.title;
    actionBar.displayHomeAsUp = true;
    actionBar.onHomeIconItemSelected = function() {
        win.fireEvent('mytest');
    };
});

win.addEventListener('mytest', function() {
    Ti.API.info("'mytest'");
    view.evalJS("doTest()");
});

win.open();


test.html:

<html>
<head>
<script type="text/javascript" src="test.js"></script>
</head>
<body>
Tap the ActionBar back arrow.
</body>
</html>


test.js:

function doTest()
{
    Ti.API.info("doTest()");
}