<script type="text/javascript" src="https://www.boletobancario.com/boletofacil/wro/direct-checkout.min.js"></script>
    <script type="text/javascript">
        var publicKey = 'E42C82315E02378DAC6D2BE8DFC3BB6487B6B08BC222255AAD45D870CFEE93AA';

        var checkout = new DirectCheckout(publicKey, false);

        var cardData = {
                cardNumber: '5480452215505109',
                holderName: 'Fulano de Tal',
                securityCode: '555',
                expirationMonth: '12',
                expirationYear: '2018'
            };

        var creditCardHash = null;

        checkout.getCardHash(cardData, function(cardHash) {
            console.log("Success");
            console.log(cardHash);
            creditCardHash = cardHash;
        }, function(error) {
            console.error(error);
        });
    </script>