nError.style.visibility = "visible";
        } else {
          descriptionError.style.visibility = "hidden";
        }

        if (amount.value.length < 1) {
          priceError.style.visibility = "visible";
        } else {
          priceError.style.visibility = "hidden";
        }

        if (invoiceid.value.length < 1 && invoiceidDiv.style.display === "block") {
          invoiceidError.style.visibility = "visible";
        } else {
          invoiceidError.style.visibility = "hidden";
        }

  