Can I buy a Godaddy domain name without having a web/credit card

Normally Godaddy required a web or a credit card for payments, but if you have a web card (Sampath/Hnb) and haven't money to pay on it, then you can use another paypal account (malaysia/other paypal account) for the transaction. Because Sri Lankans are not allowed to reserve money to their paypal  account. That is why you have to use above method.