You could have your CGI-script generate the page with the submit button. The have the FORM's action point to the same script. The script when passed parameters will then update and display. Otherwise you could have the cgi program generate a page with a page that pointed to the update html file in a META REFRESH TAG something like...
<HTML><HEAD>
<META HTTP-EQUIV="refresh" Content="1"; URL=http://mysite.com/updatedp
+age.html>
</HEAD>
<BODY>
If your browser doesn't automatically redirect you click <A HREF=http:
+//mysite.com/updatedpage.html>here</A>
</BODY>
</HTML>