I am working on a single page that will have a check out button to charge a 20$ to my client. when client successfully pay this amount I want to get True and paid amount on response handler file.

I download google checkout sample code and read lots of tutorials on internet but no gain.

can you guide me how to do this from start to end, step by step. all the things I need and all the steps I need to perform

i shall be thank full to you