Using Facebook Graph API JS Object

fb.js

var logFB = function(url) {
      var login_status, _data, _fb, _get_share_count2;
      if (url == null) url = false;
      if (url === false) url = window.location.href;
      _data = {};
      _get_share_count2 = function(url, callback) {
        var params;
        if (typeof window.FB !== 'undefined') {
          window.FB.api('/', {
            id: url
          }, function(response) {
            if (response['shares'] !== 'undefined') {
              return callback(response['shares']);
            }
          });
        } else {
          params = {
            url: 'https://graph.facebook.com/?id=' + encodeURIComponent(url),
            async: false,
            success: function(response) {
              if (response['shares'] !== 'undefined') {
                return callback(response['shares']);
              }
            }
          };
          $.ajax(params);
        }
      };