How to redirect the user from an external server page back into the app built in jquery mobile?

How to redirect the user from an external server page back into the app built in jquery mobile?

I am developing an ecommerce app in jquery mobile packaging it in phone gap.
Now i want my users to come back into the app after paying in the page hosted by some gateway.
It is taking them in the return_url specified in the account. I want to create a link in the return_url page that they can come back into the app to shop again?