I am no programmer just know how to edit parts of code when I am told where and what.
What I want to do is capture a promo code and when the user clicks on the button that would normally be the "sent" or whatever button in a contact form he or she should be redirected to a predefined link, which gets now the promo code as subid...
So if the user was to enter 123 as the promocode and the domain was test.com
he should be redirected to test.com/subid=123
Can anybody help me with this?