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Request.Form("test1") will return an empty string if the field does not exist, but also when users leave it blank.  A better solution is to use Request.FormCount("test1"), which will return 0 if the field does not exist.

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Sent by Ramon on 09/05/2003 07:01:53 AM:
is there a way to know whether the input text name is defined or not?
ex. i have <input type="text" name="test1">
how can i know that "test2" doesn't exist?