protected void Page_Load(object sender, EventArgs e)
{
bool valid = CheckFunctions.checkInvoices();
if (valid)
{
PaymentFunctions.loadPayment_Data(invoicePaymentDropDown);
PaymentFunctions.loadInvoiceInfo(invoicePaymentDropDown, itemDescAndCostList, invoiceItemsLabel, customerLabel, dueDateLabel, totalLabel, packageNameLabel);
}
}