Many thanks for the suggestions.

I don't think disabling the submit button under the current setup would work, because many customers make basic errors (eg. forget to enter email address etc) and need to resubmit. This basic error checking is done my the same script before sending the order to the bank. Maybe I need to find another way to check errors so I can disable the submit button.

And only allowing one instance of the program to run - what about other customers ordering simultaneously?

Atm I am leaning towards the hidden variable and having the form dynamically created by the program.

Thanks.

In reply to Re: Hitting submit twice by pcwsp
in thread Hitting submit twice by pcwsp

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