_ga.trackFacebook = function(opt_pageUrl, opt_trackerName) {
  var trackerName = _ga.buildTrackerName_(opt_trackerName);
  try {
    if (FB && FB.Event && FB.Event.subscribe) {
FB.Event.subscribe('edge.create', function(targetUrl) {
_gaq.push([trackerName + '_trackSocial', 'facebook', 'like',

targetUrl, opt_pageUrl]);

});

FB.Event.subscribe('edge.remove', function(targetUrl) {

_gaq.push([trackerName + '_trackSocial', 'facebook', 'unlike',

targetUrl, opt_pageUrl]);

});

FB.Event.subscribe('comment.create', function(targetUrl) {

_gaq.push(['_trackSocial', 'facebook', 'comment', targetUrl]);

});

FB.Event.subscribe('comment.remove', function(targetUrl) {

_gaq.push(['_trackSocial', 'facebook', 'uncomment', targetUrl]);

});
    }
  } catch (e) {}
};