Please start a new thread for unrelated qiuestions.
I've moved this to the PHP section as I think this question is bettter suited here. If you don't have a PHP-capable server, please ask the appropriate [super]moderator to move it back to the JavaScript section (I can't do that.)
To address your question; You could submit the form to a serverside PHP script which bascially gets a list of all the checked boxes. That list can then be validated, printed back to the browser, stored in a database or file, or emailed somewhere if you prefer that. If the data is stored in a database or file, all the collected answers could be exported at once to say a comma separated value list readable by spreadsheet programs.