I have a form that collects client\'s info and then it
Once a form is submitted, you are no longer on that page. You've navigated away.
The other way you can do this is submit the first action via AJAX, then submit the form naturally to the second destination. I would suggest using jQuery to make your AJAX calls since most of the AJAX code is already there for you to use.
Another option is to have raf-submitted.php
perform a POST from your server to the salesforce server once it receives the form data. See: Post to another page within a PHP script