Php script for mail form

The PHP form I downloaded from this site ( http://www.flash-db.com/Tutorials/email/Email.php?page=2 ) works great for me except one problem:

After the mail is sent, a new browSer window opens with this message"

mail sent - we will be in touch with you shortly&

However, I don’t want that to happen. To be sure, I don’t want php to do anything else after the mail I sent; I’ll do that on the Flash end…

So, how can I edit the php script to have it not open any new browser window and not do anything else but send the variables…thank you…