well, you just put a link to Maybank2u.com at your payment page along with you account information, and ask your customer goes to the website and pay online.
You might need to include simple instructions/tutorial about how to pay online via Maybank2u at the same page. [note: user are required to register online banking account first]
btw, Consider to accept Wang Pos or cheque payment also.
If you want to accept credit card payments, get an online merchant account.
So far, 2CheckOut.com and PaySystems.com are quite popular. Both of them only required one time registration fee US$49, no monthly fee.
Hope these helps
