I have a simple form that pops up in a FancyBox iFrame to allow users to sign up for one (or both) of the two newsletters on offer. Here's the page that gets iFramed. The pop-up is triggered by clicking the yellow Post-it in the sidebar here.
Now the emails that go out to subcribers have links to subscribe, unsubscribe, and to subscribe to the list *other* than the one they're on (i.e. you get a mail from List 1 but it has a link to subscribe to List 2 also).
I'm using links with query strings in the emails so someone who clicks on a link to subscribe to List 1 will get a form with their name and email filled in, and the List 1 checkbox checked.
The name and email are populating as expected (http://www.chiefrabbi.co.za/sign-up/?username=Bobemail@example.com), but I don't know how to get the checkbox pre-checked. The parameter I'm using for now for the first checkbox is 'connecting'. How do I specify this in the query string? &connecting=checked, &connecting=true, &connecting=yes all do nothing.
What's the correct syntax?