diff --git a/html/html/themes/ipfire/include/functions.pl b/html/html/themes/ipfire/include/functions.pl
index f4c241a55..f354a45bf 100644
--- a/html/html/themes/ipfire/include/functions.pl
+++ b/html/html/themes/ipfire/include/functions.pl
@@ -128,6 +128,12 @@ print <<END;
 	<meta http-equiv="Content-Type" content="text/html; charset=UTF-8"/>
 	<link rel="shortcut icon" href="/favicon.ico" />
 	<script type="text/javascript" src="/include/jquery.js"></script>
+
+	<script language="javascript" type="text/javascript">
+		function swapVisibility(id) {
+			\$('#' + id).toggle();
+		}
+	</script>
 END
 
 	foreach my $stylesheet (@stylesheets) {