Conditional Redirects

I would like to redirect users who submit a form with a particular option chosen (in this case a checkbox) to a page on my site. All other form submissions without the option will display the usual successful submission message.

I can get a general redirection for all submissions to work using: on_sent_ok: "location = 'http://example.com/';"

I have already searched and found this solution for older version, but CF7 code has been updated since.

Any suggestions please?

http://ww.wp.xz.cn/plugins/contact-form-7/