Classic ASP. Where a user is coming from?

One certain page of my mobile开发者_StackOverflow社区 website, I want to it so that when the users come to a certain page with a form on it part of the form will be filled out for them depending on what page they came from. How can i do this?

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You're looking for the Referer header.
However, you cannot rely on this header to exist or be correct.

Instead, you can put a parameter in the query string in each of the source pages.

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Request.ServerVariables("HTTP_REFERER")