function ddlChangedTussenvoegsel(ddl,hidden) {
            if (ddl.options[ddl.selectedIndex].value == 999) {
                hidden.style.display = '';
            }
            else {
                hidden.style.display = 'none';
            }

        }

        function ddlChangedOnderwerp(ddl, factSheet,OnderwerpAnders) {
            if (ddl.options[ddl.selectedIndex].value == 99) {
                document.getElementById(OnderwerpAnders).style.display = '';
                factSheet.style.display = 'none';
            }
            else if (ddl.options[ddl.selectedIndex].value == 6) {
            factSheet.style.display = '';
            document.getElementById(OnderwerpAnders).style.display = 'none';
            }
            else {
                factSheet.style.display = 'none';
                document.getElementById(OnderwerpAnders).style.display = 'none';
            }
        }

        function ddlChangedGevondenVia(ddl,gevondenViaAnders) {
            if (ddl.options[ddl.selectedIndex].value == 99) {
                gevondenViaAnders.style.display = '';
            }
            else {
                gevondenViaAnders.style.display = 'none';
            }
        }

        function ddlChangeWanneer(ddl, WanneerAnders) {
            if (ddl.options[ddl.selectedIndex].value == 99) {
                WanneerAnders.style.display = '';
            }
            else {
                WanneerAnders.style.display = 'none';
            }
        }

        function ddlChangeLand(ddl, landTelCode) {
            landTelCode.value = ddl.options[ddl.selectedIndex].value;
        }

        function CheckTelefoonnummer(objTelefoon,objCountry) {
            if (document.getElementById(objCountry).value == "NL") {
                if (!ValidateTelefoonnummer(objTelefoon, true, true, true, false)) return false;
            }
        }