[Plugin: Shadowbox JS] parent.Shadowbox.close

Great plugin.

I am using it to display a newsletter signup window: https://b-e-m.org/

After you fill in the form with your name, email and language and click submit, it takes you to a new page. That page is currently loading inside the window.

How can I set it so when you click submit, the overlay closes and opens the URL in a window?

Thanks!