Retyping information if the card is declined

When a transaction is declined by authorize.net (e.g. the credit card number or expiration was wrong), the donor needs to return to the page and type all his information again.

I'm looking for a way to have the form remember some of the details (e.g. name, donation amount etc.) to save the donor the headache of typing it all again.

Any ideas?

Otherwise, the component is fabulous!