function onFbLogin() {
    window.location = base_url + 'login/?fbconnect=true';
}

var onNotConnected = function() {
    if(fb_user != '') {
        window.location = base_url;
    }
}

FB.init("ba05fcac2d88f4fbef31c5d464940192","/xd_receiver.htm", {'ifUserNotConnected':onNotConnected});