explanation on an easy and a percentage based credit card charging

Hi I have a service that i want to sell. I want to sell it over the internet. I would like to know here how can i charge credit cards over the internet? (I have a paypal account so if this money can be transfered to my paypal account this could be great) I have noticed that there are some services that can help me however they require some money, i want something that is cheap and will take some percentage of my sale not a fixed charge per month or year, and most important will be easy to use! I'm a software developer (java) so if i need to integrate with some service i want information on how to do this, shouldnt neccessaraly be in java, could be just something like you need to call this url with those parameters - credit card number, name etc... To sum it up i need answers to the following questions: An example / tutorial step by step (doesnt have to be real code) of how can i charge credit cards over the internet with a service that will charge only some percentage. The example / tutorial shoudl be something that i can later perform myself and at the end of it i will be able to charge credit cards over the internet. An example of an example could be: Create a form that has a few text boxes, credit card number, card holder name etc, later when the user presses submit call the following url with those parameters, at first you will need to register to this web site, registration is simple and you dont need to pay anything they will only charge you for some percentage of your sales. Thanks ## Deliverables 1) Complete and fully-functional working program(s) in executable form as well as complete source code of all work done. 2) Deliverables must be in ready-to-run condition, as follows (depending on the nature of the deliverables): a) For web sites or other server-side deliverables intended to only ever exist in one place in the Buyer's environment--Deliverables must be installed by the Seller in ready-to-run condition in the Buyer's environment. b) For all others including desktop software or software the buyer intends to distribute: A software installation package that will install the software in ready-to-run condition on the platform(s) specified in this bid request. 3) All deliverables will be considered "work made for hire" under U.S. Copyright law. Buyer will receive exclusive and complete copyrights to all work purchased. (No GPL, GNU, 3rd party components, etc. unless all copyright ramifications are explained AND AGREED TO by the buyer on the site per the coder's Seller Legal Agreement). ## Platform Windows / Java / JSP / Tutorial