      purchase_units[0].description = description.value;
        purchase_units[0].amount.value = amount.value;

        if(invoiceid.value !== '') {
          purchase_units[0].invoice_id = invoiceid.value;
        }
      },

      createOrder: function (data, actions) {
        return actions.order.create({
          purchase_units: purchase_units,
        });
      },

      onApprove: function (data, actions) {
        return actions.order.capture().then(function (details) {
          alert('Transactio