$(document).ready(function() {

        $("#CheckOut").click(function() {
            var sku = $("#VariantID").val();
            var quantity = $("#Quantity").val();
            var url = "https://cascadedesigns.com/addtocart.aspx?ProductID=1211&VariantID=" + sku + "&Quantity=" + quantity + "&ReturnURL=http://platypreserve.com";
            window.location = url;
            return false;
        });
   });