gistfile1.js

function postToFeed(title, desc, url, image) {
   var obj = {method: 'feed', link: url, picture: image, name: title, description: desc};
   function callback(response){}
   FB.ui(obj, callback);
}
$('.btn-facebook').click(function(e) {
    var elem = $(this);
    postToFeed(elem.data('title'), elem.data('desc'), elem.prop('href'), elem.data('image'));
    return false;
});