diff --git a/functions.js b/functions.js
index 732e73ec8..8a370d6b8 100644
--- a/functions.js
+++ b/functions.js
@@ -1401,9 +1401,9 @@ function appearBlockElement_afh(effect) {
 
 function checkboxToggleElement(elem, id) {
 	if (elem.checked) {
-		Effect.SlideDown(id, {duration : 1.0});
+		Effect.SlideDown(id, {duration : 0.5});
 	} else {
-		Effect.SlideUp(id, {duration : 1.0});
+		Effect.SlideUp(id, {duration : 0.5});
 	}
 }