function callbackFacebook (post_id, exception) {
 if(post_id) {
   if (document.getElementById('streamPublishedOnFacebook'))
     document.getElementById('streamPublishedOnFacebook').value=1;  
 }
}

function shareOnFacebook() {
    FB.Connect.streamPublish('', act_attachments,act_links,null,'',callbackFacebook);
    return false;
}
FB.init('983a0af8fcb239425275a07719fecac6');