diff --git a/include/themes/dark/main.js b/include/themes/dark/main.js
index 48c9b8f5b..57ce5c281 100644
--- a/include/themes/dark/main.js
+++ b/include/themes/dark/main.js
@@ -237,8 +237,9 @@ function setMenuVisibility() {
 	});
 
 	// Functon to give life to the Navigation pane
-	$('#nav li:has(ul) a.active').unbind().click(function() {
+	$('#nav li:has(ul) a.active').unbind().click(function(event) {
 		event.preventDefault();
+
 		if ($(this).next().is(':visible')){
 			$(this).next().slideUp( { duration: 200, easing: 'swing' } );
 			storage.set($(this).text(), 'collapsed');
diff --git a/include/themes/modern/main.js b/include/themes/modern/main.js
index 4143974dc..5e32f8ec6 100644
--- a/include/themes/modern/main.js
+++ b/include/themes/modern/main.js
@@ -227,8 +227,9 @@ function setMenuVisibility() {
 	});
 
 	// Functon to give life to the Navigation pane
-	$('#nav li:has(ul) a.active').unbind().click(function() {
+	$('#nav li:has(ul) a.active').unbind().click(function(event) {
 		event.preventDefault();
+
 		if ($(this).next().is(':visible')){
 			$(this).next().slideUp( { duration: 200, easing: 'swing' } );
 			storage.set($(this).text(), 'collapsed');