--- loncom/interface/lonmenu.pm	2023/10/02 21:01:21	1.539
+++ loncom/interface/lonmenu.pm	2023/10/06 02:04:47	1.540
@@ -1,7 +1,7 @@
 # The LearningOnline Network with CAPA
 # Routines to control the menu
 #
-# $Id: lonmenu.pm,v 1.539 2023/10/02 21:01:21 raeburn Exp $
+# $Id: lonmenu.pm,v 1.540 2023/10/06 02:04:47 raeburn Exp $
 #
 # Copyright Michigan State University Board of Trustees
 #
@@ -1122,7 +1122,7 @@ sub innerregister {
                 $change = 'on';
                 $visibility = 'none';
                 $leftvis = 'inline';
-                if ($defdom eq '') {       
+                if ($defdom eq '') {
                     $defdom = $cdom;
                 }
             }
@@ -2421,7 +2421,13 @@ function toggleViewAsUser(change) {
 function validCourseUser(form,change) {
     var possuname = form.elements['vuname'].value;
     var possuid = form.elements['vid'].value;
-    var possudom = form.elements['vudom'].value;
+    var domelem = form.elements['vudom'];
+    var possudom = '';
+    if ((domelem.tagName === 'INPUT') && ((domelem.type === 'text') || (domelem.type === 'hidden'))) {
+        possudom = domelem.value;
+    } else if (domelem.tagName === 'SELECT') {
+        possudom = domelem.options[domelem.selectedIndex].value;
+    }
     if ((possuname == '') && (possuid == '')) {
         if (change == 'off') {
             form.elements['LC_viewas'].value = '';