Programmatic way to close an alert

app.js

// Open an existing window
window.open();
 
// Create the alert dialog popup
var popup = Ti.UI.createAlertDialog({
    title: "Confirm Purchase?",
    buttonNames: ["Yes", "No"],
    cancel: 1
});
 
// Wait a couple of seconds to pop up the alert
setTimeout(function() {
    // Show the alert dialog
    popup.show();
 
    // Add an event listener that closes the popup
    Ti.App.addEventListener("closeAlert", function(e) {
        // Hide the popup
        popup.hide();
    });
 
    // Wait 2 more seconds, fire the event
    setTimeout(function() {
        Ti.App.fireEvent("closeAlert", { test: "data" });
    }, 2000);
}, 2000);