Repair my facebox pop-up postcode search

If you go to this site for the example ` [login to view URL] i have 2 forms one is on the page (which i want to remove) the other im using facebox to bring it up when they click on orange button. The issue is the postcode search only works on the form on the page. I'm not sure why this is or how to get it working any ideas? using [login to view URL] script to search for the postcode $("#swSearch").autocomplete({ minLength: 1, source: function(req, add){ $.ajax({ url: '[login to view URL]', //Controller where search is performed dataType: 'json', type: 'POST', data: req, success: function(data){ if([login to view URL] =='true'){ add([login to view URL]); } } }); } }); </script>