melanie71 on "[Plugin: Contact Form 7] Redirecting to Another URL After Submissions"

Hi
I am using the info found here http://contactform7.com/redirecting-to-another-url-after-submissions/ which works great, I just don't want the visitor to leave the original website completely. Just wondering if anyone knows how to amend the code so that the redirect opens in a new window?
Thank you!

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