Fix paypal issue on my website

on my website, when customer choose to pay with paypal, it bring customer to paypal, he login and then paypal bring the customer back to my website. what i want is not this. i want when customer choose paypal, customer go to paypal website, login, and then press pay then paypal redirect the customer to the confirmation page on my website. it should be a small job and i need this right now. thank you