function addToCart(guid) {
  var cartCmd = document.getElementById("cartcmd");
  var productGuid = document.getElementById("productguid");
  var cartForm = document.getElementById("cartform");
  var quantityElement = document.getElementById("productquantity_" + guid);
  var quantity = quantityElement.value;
  var minquantity = g_minqty[guid];

  if(quantity > 0) {
    if(quantity < minquantity) {
      alert("You must order above the minimum quantity");
      return;
    }
  }

  cartCmd.value = 'addsingleproduct'; 
  productGuid.value = guid;
  cartForm.submit();
 
}

function addProductsToCart() {
  var cartForm = document.getElementById("cartform");
  var quantityElement = null;
  var minquantity = 0;
  var quantity = 0;
  var badquantity = false;
  for(var key in g_minqty) {
    quantityElement = document.getElementById("productquantity_" + key);
    if(quantityElement) {
      quantity = quantityElement.value;
      minquantity = g_minqty[key];
      if(quantity > 0) {
        if(quantity < minquantity) {
          badquantity = true;
        }
      }
    }
    
  }
  if(badquantity) {
    alert('Not all quantities are over the minimum');
    return;
  }
  cartForm.submit();
}