var url = "oe.pl?" +
"action=edit_periodic_invoices_config&" +
"periodic_invoices_config=" + encodeURIComponent(config) + "&" +
- "transdate=" + encodeURIComponent(transdate);
+ "transdate=" + encodeURIComponent(transdate || '');
// alert(url);
window.open(url, "_new_generic", parm);