JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
If I understand you correctly, you want to have an option to use credit cards in your payment field right?
In Paypal, once the form is submitted, you will see an option whether you want to use credit card or Paypal account. If you like, you can use Paypal Pro because it lets you charge the customer via credit card or Paypal account inside your form.
You can also use other payment processors like Strip or Authorize.Net. They allow credit card payment as well.
Payment forms guide section: http://www.jotform.com/help/chapter-7-Payment+Forms
Hope this helps. Let us know if you need any help.