[jQuery] Checkboxes and radios

[jQuery] Checkboxes and radios

I'm trying to control N checkboxes, when one is selected or unselected, I need to enable/disable a radio next to the checkbox
something like this:
( ) [ ]
(o) [x]
the marked one, turn the radio clickable
I start this code
  $('.form-checkbox').each( function() {
    $('.form-checkbox:radio').attr('disabled', $(this).attr('checked'));
  });
<br clear="all">It returns every checkbox, but I cant figure out how to find the radio object from each one
Thanks in advance for any tip :)
huge hug
Feijó