If you are serious about gambling online you will need to get yourself an e-wallet. An e-wallet is a third party company which allows you to add, withdraw, and transfer funds into an online account.
You put your money into your e-wallet using a credit card or bank account, you transfer your money into the online casino you want to use, you transfer your winnings back into the e-wallet, you withdraw the money from the e-wallet.
This may seem like an extra step, but it is worthwhile. Why not just use your credit card and skip the whole e-wallet business, you ask?
First of all there is withdrawals. You plan on winning, right?