Either you have Javascript disabled, or you're using an unsupported browser, amigo! That's why you're seeing this old-school credit card input form instead of a fancy new Skeuocard. On the other hand, at least you know it gracefully degrades...
Visa: 4111111111111111 Discover: 6011111111111117 MasterCard: 5111111111111118 Maestro: 5018111111111112 JCB: 3511111111111119 Union Pay: 6211111111111111 American Express: 371111111111114 Diners Club: 38111111111119