Maybe provide an "opt out" button and make that the default so that that is an explicit option. After all, after the user has made a choice they can't go back to the original page state unless you provide an additional button.

Perl is the programming world's equivalent of English

In reply to Re^3: How to handle multiple buttons inside CGI form by GrandFather
in thread How to handle multiple buttons inside CGI form by doubledecker

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