9 <script>
  10 function check() {
  11         //better than the way that fb wiki describes
  12         var perms = 'email,user_location,offline_access';
  13
  14     FB.ui({
  15         method  :  'permissions.request',
  16         perms   :   perms,
  17         display :  'page'
  18     }, function (response) {
  19         if (response.perms = perms) {
  20             FB.api('/me', function (response) {
  21                 $.get('checkentry.php', {
  22                     'id': response.id,
  23                     'week': '<?php echo $week; ?>'
  24                 }, function (data) {
  25                     if (data.go == 'TRUE') {
  26                         if (data.known == 'TRUE') {
  27                             //go to the form and pull their details from the db if we already have been authorized
  28                             $('body').load('?guess=1&fbid='+response.id);
  29                         } else {
  30                                                         FB.getLoginStatus(function(response) {
  31                                                           if (response.session) {
  32                                                                 //go to the form
  33                                                                 $('body').load('?entry');
  34                                                           } else {
  35                                                                 //they didn't grant permissions
  36                                                           }
  37                                                         });
  38                         }
  39                     } else {
  40                         //later: display a lightbox telling them they've already submitted?
  41                     }
  42                 }, 'json');
  43             });
  44         }
  45     });
  46 }
  47 </script>