new version of line item validation

order.js

    purchasing.validateLineItem = function () {
        $(".line-item-row").each(function () {
            var row = $(this);
            var hasQuantity = purchasing.cleanNumber(row.find(".quantity").val()) !== '';
            var hasPrice = purchasing.cleanNumber(row.find(".price").val()) !== '';
            var hasDescription = row.find(".description").val().trim() !== '';
            
            if (hasQuantity || hasPrice || hasDescription) {
                row.find(".quantity").toggleClass("line-item-ok", hasQuantity).toggleClass("line-item-warning", !hasQuantity);
                row.find(".description").toggleClass("line-item-ok", hasDescription).toggleClass("line-item-warning", !hasDescription);
                row.find(".price").toggleClass("line-item-ok", hasPrice).toggleClass("line-item-warning", !hasPrice);
            }
            else {
                row.find(":input").removeClass("line-item-ok").removeClass("line-item-warning");
            }
        });
    };