From bf71575bb4f37321b71ef8ce21c8208ad2b192da Mon Sep 17 00:00:00 2001
From: Rich Dougherty <rich@rd.gen.nz>
Date: Wed, 11 Nov 2009 13:56:39 -0500
Subject: [PATCH] Land Rich's fix for not using window.top to do frame
 detection. Fixes #4787.

---
 src/event.js | 11 ++++++++---
 1 file changed, 8 insertions(+), 3 deletions(-)

diff --git a/src/event.js b/src/event.js
index e2087cc13..1468d0c59 100644
--- a/src/event.js
+++ b/src/event.js
@@ -849,10 +849,15 @@ function bindReady() {
 			}
 		});
 
-		// If IE and not an iframe
+		// If IE and not a frame
 		// continually check to see if the document is ready
-		// NOTE: DO NOT CHANGE TO ===, FAILS IN IE.
-		if ( document.documentElement.doScroll && window == window.top ) (function() {
+		var toplevel = false;
+
+		try {
+			toplevel = window.frameElement === undefined;
+		} catch(e){}
+
+		if ( document.documentElement.doScroll && toplevel ) (function() {
 			if ( jQuery.isReady ) {
 				return;
 			}
-- 
2.39.5