Multiple Payment Method Options
Here we'll provide further information on how to set up multiple payment method options, following on from the ecommerce/checkout_standard doc.
As outlined in that doc, you can insert payment methods by ID, and set which is the default. Once you have multiple options, you'll need a way to tell the system which to use. The following JS function will do that for you, and can be applied to any action you like, such as clicking a radio button, or opening an accordion.