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[multidots]

What we can do for facebook connect  either user logged in or not in facebook?

=> Just put the following jquery code in your file in which You want to use it :

    
    $(document).ready(function() {        
                FB.init({appId: 'your appId', status: false, cookie: true, xfbml: true, oauth: true});
                (function(d, s, id) {
                var js, fjs = d.getElementsByTagName(s)[0];
                    if (d.getElementById(id)) return;
                    js = d.createElement(s); js.id = id;
                    js.src = document.location.protocol+"//connect.facebook.net/en_US/all.js#xfbml=1&appId=your appId  ";
                    fjs.parentNode.insertBefore(js, fjs);
                }(document, 'script', 'facebook-jssdk'));
  
    FB.getLoginStatus(function(response) {
                    if (!response.session) {                        
                           FB.init({appId: 'your appId', status: false, cookie: true, xfbml: true, oauth: true});
                           setEvents();
                       }
           });
                                              
            });


    function setEvents() {
                FB.Event.subscribe('auth.authResponseChange', function(response) {                        
                        // do something with response
                        if(response.status==='connected') {
                            var newsletterval = 0;
                                if(document.getElementById('newsletter') && document.getElementById('newsletter').checked) {
                                newsletterval = 1;
                            }
                        
                            var RAccessToken = response.authResponse.accessToken;
                            var RExpiresIn = response.authResponse.expiresIn;                                                             
                            window.location.href = "<?php echo $FaceBookLoginURL; ?>?newsletter="+newsletterval;                            
                            
                        }                        
                    });
            }