https://www.paypal.com/sdk/js?client-id=sb&currency=EUR function initPayPalButton() { var shipping = 0; var itemOptions = document.querySelector(„#smart-button-container #item-options“); var quantity = parseInt(); var quantitySelect = document.querySelector(„#smart-button-container #quantitySelect“); if (!isNaN(quantity)) { quantitySelect.style.visibility = „visible“; } var orderDescription = ‚CD bestellen‘; if(orderDescription === “) { orderDescription = ‚Item‘; } paypal.Buttons({ style: { shape: ‚rect‘, color: ‚blue‘, layout: ‚vertical‘, label: ‚checkout‘, }, createOrder: function(data, actions) { var selectedItemDescription = itemOptions.options[itemOptions.selectedIndex].value; var selectedItemPrice = parseFloat(itemOptions.options[itemOptions.selectedIndex].getAttribute(„price“)); var tax = (7 === 0) ? 0 : (selectedItemPrice * (parseFloat(7)/100)); if(quantitySelect.options.length > 0) { quantity = parseInt(quantitySelect.options[quantitySelect.selectedIndex].value); } else { quantity = 1; } tax *= quantity; tax = Math.round(tax * 100) / 100; var priceTotal = quantity * selectedItemPrice + parseFloat(shipping) + tax; priceTotal = Math.round(priceTotal * 100) / 100; var itemTotalValue = Math.round((selectedItemPrice * quantity) * 100) / 100; return actions.order.create({ purchase_units: [{ description: orderDescription, amount: { currency_code: ‚EUR‘, value: priceTotal, breakdown: { item_total: { currency_code: ‚EUR‘, value: itemTotalValue, }, shipping: { currency_code: ‚EUR‘, value: shipping, }, tax_total: { currency_code: ‚EUR‘, value: tax, } } }, items: [{ name: selectedItemDescription, unit_amount: { currency_code: ‚EUR‘, value: selectedItemPrice, }, quantity: quantity }] }] }); }, onApprove: function(data, actions) { return actions.order.capture().then(function(details) { alert(‚Transaction completed by ‚ + details.payer.name.given_name + ‚!‘); }); }, onError: function(err) { console.log(err); }, }).render(‚#paypal-button-container‘); } initPayPalButton();