On this github pages example, the submit button will not work because gh-pages doesn't run PHP. This is the included angular form and styling. Try entering 5 or more characters in the Credict Card number slot to see the behavior
Your Information
First Name
Last Name
Email
Company
Billing Information
Card Holder Name
Credit Card Number
Expiration Date MM/YY
CVV
Price: $50
Expect your account to be billed immediately