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-rw-r--r--ui/ui.accordion.js3
1 files changed, 3 insertions, 0 deletions
diff --git a/ui/ui.accordion.js b/ui/ui.accordion.js
index c7e55f5c8..42ac3f082 100644
--- a/ui/ui.accordion.js
+++ b/ui/ui.accordion.js
@@ -335,6 +335,9 @@ $.widget("ui.accordion", {
duration = o.duration,
easing = o.animated;
+ if (easing && !$.ui.accordion.animations[easing] && !$.easing[easing]) {
+ easing = 'slide';
+ }
if (!animations[easing]) {
animations[easing] = function(options) {
this.slide(options, {