Clearing a Form

[Peter Fleck]

I have a cgi that creates a form and then receives the output of the 
form and sends it to a mysql database. It also displays the form 
information as a preview of what is getting sent to the database.

You can return to the original form with data if you need to correct 
something via an 'Edit' button. This button also makes sure that 
nothing gets stored in the database (by deleting the data that was 
just sent and I know there must be a better way to do that part but 
it's not my current question).

If the visitor uses the browser 'Back' button to return to the form, 
their data will be there but the record won't get deleted from the 
database.

How do I erase all the data from the form if the visitor chooses to 
use the Back button? I tried the CGI.pm method mentioned in 
O'Reilly's CGI Programming:

print $dataIn->header( -type => "text/html", -expires => "now");

but that doesn't do it.

I'm wondering if javascript is the answer?

Thanks.
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Peter Fleck
Webmaster | University of Minnesota Cancer Center
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