Adding a button to connect to a page

Hello All,

Final piece to complete implementing iReceivables is to connect to a third party payment system to let the customer pay the invoice without leaving iReceivables.

Button will popup with few items for the customers to enter/ credit card/amount etc. and once they pay, it will return back to the current page.

Can this be done? What will be the best option to achieve it? The html page will have the link to post the payment with access credentials.

Any suggestion/ideas greatly appreciated.

Thanks

Lalitha