From: "oetjoen" <[EMAIL PROTECTED]>
> Actually I want to prevent someone would be resubmitted the same data more
> than once by using back button on internet browser. so I think its better
> idea if I using the previous page has been expired.
> Or anyone could give me any idea.
To protect yourself in case they use the back button, you could include a
hidden variable in the submitted form that uniquely identifies that instance
of the form. Then don't process the form if it is submitted with a
variable/value pair that you've already seen.
-- Peter.
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