From 50a98bf7d0fae2b13f2bb89f352ae6497f32bfee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E5=8D=A2=E8=BE=BE?= <i@luda.me>
Date: Thu, 29 Jan 2015 21:41:16 +0800
Subject: [PATCH] Update bootstrap-contextmenu.js

---
 bootstrap-contextmenu.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/bootstrap-contextmenu.js b/bootstrap-contextmenu.js
index dc1e38bc..d985c090 100644
--- a/bootstrap-contextmenu.js
+++ b/bootstrap-contextmenu.js
@@ -159,7 +159,7 @@
 			// If context-menu's parent is positioned using absolute or relative positioning,
 			// the calculated mouse position will be incorrect.
 			// Adjust the position of the menu by its offset parent position.
-			parentOffset = $menu.offsetParent().offset();
+			parentOffset = $menu.offsetParent().offset() || { left: 0, top: 0};
 			X.left = X.left - parentOffset.left;
 			Y.top = Y.top - parentOffset.top;