Hello I am creating a website with wordpress. I need a payment system like this website: http://www.askdrshah.com/online.aspx I can not find any plugin or script. Can you help me? Thanks.
You can use a service like Stripe (https://stripe.com) as your payment processor and replicate a similar payment/checkout system w/ their API.
hello there's this service http://www.ecwid.com/ very good store platform add your products choose payment providers you cn customize almost anything and its free upto a certain extent use on site just embed the code to page you want your store to appear