No, I don't. I have a control, what to send to the site... Hmm. I could ask to do it another way, but then it would a little different.
I could send some data to the 'unrelated' site, and send the data from the checkboxes to the database. Then, when the site will send the user to my chosen site... It could be, that it would do some different thing. Hm. Maybe, if someone could say, that he/she could do it, could send me a PM, and I could give the details, why and what exactly would be the use of it.
Or, maybe I could PM you, Pikachu, and ask for advice, what would be the reliable way to do it? I don't want to post the exact use of this system I thought of in public.