How is a bank card form implemented in the most popular eCommerce websites in Brazil?

[dmitrii_fediuk]

Website	Rank *	Bank Card Form
mercadolivre.com.br	9	t/4065
magazineluiza.com.br	99	t/4068
Walmart Brazil	107	t/4071
ricardoeletro.com.br	272	t/4070
fastshop.com.br	614	t/4069
fnac.com.br	1614	t/4067

* Alexa Rank in Brazil