Allowing Customer to lookup invoice from website?

Allowing Customer to lookup invoice from website?

Would it be possible to allow my customers to lookup their invoice online?  Allowing them to view their invoice online and pay online through my website?  I know currently my invoices are emailed to the customer would it be possible to have this also pull up through a simple query on my website?

perhaps through a script of some sort to allow access to the backend?

FWIW I'm hosted on godaddy.com with there website tonight function.