var askBuyVariables = function(o) {
    var buy = o.req.session.currency_to_buy;
    if (buy == "Euro") {
        if (!o.req.session.bank_account_number) {
            askForSessionVariable(o, 'bank_account_number', 'Please enter your bank account number', function(o) {
                if (!o.req.session.bank_name) {
                    askForSessionVariable(o, 'bank_name', 'Please enter your bank name', function(o) {
                        if (!o.req.session.bank_recipient) {
                            askForSessionVariable(o, 'bank_recipient', 'Please enter your recipient name', function (o) {
                                if (typeof o.req.session.bank_recipient !== "undefined") {
                                    askForSessionVariable(o, 'bank_reference', '(optional) Please enter your reference number',
                                        function (o) {
                                            askForSessionVariable(o, 'bank_reference', '(optional) Please enter your '
                                                + 'reference number', function(o) {

                                            });
                                        }
                                    );
                                }
                            });
                        }
                    });
                }
            });
        }
    }
    o.next(o);
}