openurl in parent window issue

openurl in parent window issue

I'm using the following command on a successful form submission:

openUrl("http://myurl.com/payment.html?paymentAmount=" + input.registrationCost, "parent window");

I have the form embedded in my website on some page.  In IE, this works as expected.  However, in Firefox, nothing happens.  It just spins with a message of "Please Wait...".  I can see that the form data is successfully submitted, but the browser never redirects to the payment.html page.  Any thoughts?

To see this issue in action, go here and enter -TEST- (including dashes) in the Husband's Name field.  You'll also need to put something in the email field, but it can just be a dummy value.