var urlCart = 'https://www.paypal.com/cart/';
var urlThankYou = 'http://www.wpines.com/ThankYou.htm';
var urlCancel = 'http://www.wpines.com/Cancel.htm';
var strBusiness = 'sales@wpines.com';
var strFeatures = 'top=50,left=50,width=810,height=555,scrollbars,location,resizable';
var strWindowName = 'cartwin';
var winCart;

function showCart() {
  var url = urlCart + 'display=1' + '&business=' + escape(strBusiness);
  if (!winCart || winCart.closed) {
    winCart = window.open(url,strWindowName,strFeatures);
    window.onunload = function () { winCart.close() };
  } else {
    winCart.location = url;
    winCart.focus();
  }
}

function addItemToCart(item,number,amount,shipping) {
  var url = urlCart +
    'add=1' +
    '&business=' + escape(strBusiness) +
    '&item_name=' + escape(item) + 
    '&item_number=' + number + 
    '&amount=' + amount + 
    '&shipping=' + shipping +
    '&shipping2=' + shipping +
    '&return=' + escape(urlThankYou) + 
    '&cancel_return=' + escape(urlCancel);
  if (!winCart || winCart.closed) {
    winCart = window.open(url,strWindowName,strFeatures);
    window.onunload = function () { winCart.close() };
  } else {
    winCart.location = url;
    winCart.focus();
  }
}