Post submit button click

[ph4unow]

I have created a form and that seems to work good the email gets sent and is received as expected. My problem is that after the user clicks the submit button the form just sits there. I am using the form through a link in an email to update user info. How do I get it to close and return the user to their email program where they were.
This is the link used: http://www.preferredhomes4u.com/buyers.php