diff --git a/APPL/MGT/mld_stdmelding.js b/APPL/MGT/mld_stdmelding.js
index 593364af0e..f4621c1741 100644
--- a/APPL/MGT/mld_stdmelding.js
+++ b/APPL/MGT/mld_stdmelding.js
@@ -19,23 +19,27 @@ function init_stdmelding()
     onChangeHighprioritytime();
     onChangeLowprioritytime()
 
-    var init_srtdisc_key = (srtdisc_key && srtdisc_key > -1 ? srtdisc_key : 0);
+    if (typeof srtdisc_key == "undefined") var srtdisc_key = -1;
+    if (typeof disc_key == "undefined") var disc_key = -1;
+
+    var init_srtdisc_key = (srtdisc_key > -1 ? srtdisc_key : 0);
     var init_disc_key = (disc_key ? disc_key : -1);
+
     fill_disciplineselector(init_srtdisc_key, init_disc_key);
     fill_issuetypeselector(0, 0);
 }
 
 function onChangeAccepttime()
 {
-    $("#accepttime_eenheid").prop("disabled", (isNaN(parseFloat($("#accepttime").val())));
+    $("#accepttime_eenheid").prop("disabled", isNaN(parseFloat($("#accepttime").val())));
 }
 function onChangeCriticaltime()
 {
-    $("#criticaltime_eenheid").prop("disabled", (isNaN(parseFloat($("#criticaltime").val())));
+    $("#criticaltime_eenheid").prop("disabled", isNaN(parseFloat($("#criticaltime").val())));
 }
 function onChangeHighprioritytime()
 {
-    $("#highprioritytime_eenheid").prop("disabled", (isNaN(parseFloat($("#highprioritytime").val())));
+    $("#highprioritytime_eenheid").prop("disabled", isNaN(parseFloat($("#highprioritytime").val())));
 }
 function onChangeLowprioritytime()
 {