Index: lams_monitoring/web/includes/javascript/monitorLesson.js
===================================================================
RCS file: /usr/local/cvsroot/lams_monitoring/web/includes/javascript/monitorLesson.js,v
diff -u -r1.18 -r1.19
--- lams_monitoring/web/includes/javascript/monitorLesson.js	15 Jul 2013 09:46:09 -0000	1.18
+++ lams_monitoring/web/includes/javascript/monitorLesson.js	15 Jul 2013 09:51:09 -0000	1.19
@@ -1436,7 +1436,11 @@
 
 function selectAllInDialogList(listId) {
 	var targetState = $('#' + listId + 'SelectAll').is(':checked') ? 'checked' : null;
-	$('#' + listId + 'List input').attr('checked', targetState);
+	$('#' + listId + 'List input').each(function(){
+		if (!$(this).is(':disabled')) {
+			$(this).attr('checked', targetState);
+		}		
+	});
 }