Warning: Page has Expired

[ddddd]

Regarding the Internet Explorer message below:

"Warning: Page has Expired The page you requested was created using
information you submitted in a form. This page is no longer available.
As a security precaution, Internet Explorer does not automatically
resubmit your information for you.
To resubmit your information and view this Web page, click the Refresh
button. "

I'm developing an e-commerce site from scratch.

I've noticed on other e-commerce websites that use other development
tools such as php or probably "websphere" (java) that when clicking
the back button this message appears during a checkout process. This
is good because it reduces customer error in many ways.

I'm using ASP and response.redirect mostly. But, I've noticed that
even setting a page timeout to zero won't stop the caching of the
page. My customer, who just submitted a form, can just click the back
button and the cached page just comes up.

How do I create the error above with ASP?

[Rune]

I can't remember where I've gotten them from, but adding these to the top of
the page works for me:

Response.ExpiresAbsolute = Now() - 1
Response.Expires = -1
Response.CacheControl = "no-cache"

Best reagads,
Rune