Rtk1 on "[Plugin: Contact Form 7] Custom actions on sent_ok"

Hi there
Anyone now how to get a URL to open in a new window/tab following a success submission of the form. I'm using the 'on_sent_ok: "location =' for the URL at the moment.
On a similar note, I'd like the form to download a document following a successful submission.
Any help much appreciated.
Richard.

http://wordpress.org/extend/plugins/contact-form-7/