paypal recurring payments form

Question

I have a website with a payment form, I want to add recurring payments. how would i do that? what ID\'s do I need to use in the form fields?

I saw a

Answer 1

a3 - amount to billed each recurrence
p3 - number of time periods between each recurrence
t3 - time period (D=days, W=weeks, M=months, Y=years)