Tying a Captcha to my payment tab

 I have a payment tab on my homepage taking tenants to authorize.net to pay. I have an issue with a lot of suspicious payment activity so I finally got a Captcha (through Jotform) loaded on the page but I do not think they are tied together . Clicking on the payment tab goes to authorize.net for preliminary info (name and amount) but the Captcha is not present on that form and it progresses to the next step in authorize.net.  Both were loaded as HTML. (HTML 1 is the payment tab and HTML 2 is the Captcha). How do I move the Captcha to the same initial step so you have to do the Captcha after entering the initial payment info?