Opencart - Payment module, Paycard (Israel)

Need to build payment module for Opencart. it should work that client click on buy, the page is redirected to [login to view URL] . after the user put his credit number client get back to the site, and then have a message - your order has been success. button that given from [login to view URL] (should be send on checkout..) <form target=_blank method=POST action='[login to view URL]' id=Form1> <input type=hidden name=INAME value=mtpurchase > <input type=hidden name=mer value=PayCard > <input type=hidden name=CreditorID value=1515474> <input type=hidden name=TransactionID value=automatic > <input type=hidden name=Amount value=21> <input type=hidden name=Currency value=ILS> <input type=hidden name=SuccessUserPage value='[login to view URL]'> <input type=hidden name=FailureUserPage value='[login to view URL]'> <input type=hidden name=UserDesc value='User Description'> <input type=hidden name=user_name value=''> <input type=hidden name=AnswerPage value=''> <input type=hidden name=ItemType value='3'> <input type=hidden name=MerchantData value='MerchantDataSTR'> <input type=hidden name=successPageParam value='1'> <input type=hidden name=Sync value='0'> <input type=hidden name=ResultPageMethod value='GET'> <input type=submit value="buy now"></form>