Web Forms :: Forcing Postback Of IFrame Form

Jan 6, 2010

I'm trying to solve a problem and am open to any suggestions. Here's the situation:

I have a checkout page that has an iFrame that contains a credit card form. The credit card form resides on an external site that is PCI compliant (and it is a requirement that we are PCI compliant so having the credit card form on our domain is not an option). When the user submits the checkout form, I need a way to force the submission of the iFrame form on the server side. This is because I need to wait for the credit card form's site to send back a reply via a web service on my end, which will be passing a token that I save and use later on when the order is submitted. I also will display any validation errors that are reported from the credit card form site, also via the web service.

This all worked just fine in a simulation, but I'm getting permission errors trying to access the form in the iFrame across domains (and after researching this, apparently it's not possible to access an iFrame's document across domains). I need a way to force the submit of the iFrame form on the server side without having access to the form itself. Can this be done? Can anyone suggest an alternative to what I'm trying to accomplish?

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