From a5a86738517904783f5fd367862fbe555c1a465d Mon Sep 17 00:00:00 2001
From: "Liming.Ma" <limingv5@gmail.com>
Date: Fri, 13 Feb 2015 20:58:01 +0800
Subject: [PATCH] fix

---
 core-overlay.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/core-overlay.html b/core-overlay.html
index 2c7c3d8..8060c24 100644
--- a/core-overlay.html
+++ b/core-overlay.html
@@ -454,7 +454,7 @@ <h2>Dialog</h2>
     completeBackdrop: function() {
       if (this.backdrop) {
         trackBackdrop(this);
-        if (getBackdrops().length === 0) {
+        if (getBackdrops().length === 0 && this.scrim.parentNode) {
           this.scrim.parentNode.removeChild(this.scrim);
         }
       }