Teach Me: How to implement a shopping cart and paying options to site?

[tbs]

so people who have their own websites/company, basically im setting up a website to sell some stuff, and i have no idea how to incorporate the billing part of the site, i have found a link http://bigcartel.com/ but theyre paypal based, and i was wondering if anyone knows how to get say Mastercard, Visa, Mastero etc instead of using paypal, as i rather would want to use Mastercard of Visa instead for payment options, and also most importantly secure for users and for the site itself.

thanks in advance!

 

[tbs]

hi, thanks for the link Rehan, i will have a look at it.

im looking for something thats easy to incorporate into my site, and being able to customise it without too much hassle, i have looked at Protx, which they do all the transfering of money and authenticating the sale etc, but am still a bit confused on the subject atm, i know theres plenty of different ways of doing it, but want to find a way thats userfriendly if you get what i mean?