function showModalPopupViaClient(ev) {
            ev.preventDefault();
            var modalPopupBehavior = $find('programmaticModalPopupBehavior');
            modalPopupBehavior.show();
        }

        function hideModalPopupViaClient(ev) {
            ev.preventDefault();
            var modalPopupBehavior = $find('programmaticModalPopupBehavior');
            modalPopupBehavior.hide();
        }