[Plugin: Custom Contact Forms] Redirection or prevent form submit twice

I hope the author will implement a way that prevent the form submit twice by refreshing the page.

Maybe by redirecting to a new page when submitting the form.
I like to use the popup message for success message but also like to redirect user to home page or custom page.

Is there a way to use both?

http://wordpress.org/extend/plugins/custom-contact-forms/