paypal.Buttons({
            createSubscription: function(data, actions) {
                return actions.subscription.create({
                    'plan_id': $('#hidden_plan').val()
                });
            },
            onApprove: function(data, actions) {
                console.log(data);
            },
            onError: function (err) {
                // Show an error page here, when an error occurs
                console.log(err);
            }
        }).render('#paypal-button-container');