Per @gibson042, don't need .documentElement since Sizzle handles.

14f67a95 · Dave Methvin · 0a1be437 · 14f67a95
Commit 14f67a95 authored Jul 26, 2012 by Dave Methvin
Hide whitespace changes
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css.js src/css.js +1 -1

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--- a/src/css.js
+++ b/src/css.js
@@ -45,7 +45,7 @@ function vendorPropName( style, name ) {

 function isHidden( elem, el ) {
 	elem = el || elem;
-	return jQuery.css( elem, "display" ) === "none" || !jQuery.contains( elem.ownerDocument.documentElement, elem );
+	return jQuery.css( elem, "display" ) === "none" || !jQuery.contains( elem.ownerDocument, elem );
 }

 function showHide( elements, show ) {