From d74985b514afbab911ff7c56d52cdef272849504 Mon Sep 17 00:00:00 2001
From: Aaron Schulz <aaron@users.mediawiki.org>
Date: Sun, 12 Apr 2009 14:55:06 +0000
Subject: [PATCH] Minor JS fix for r49408

---
 skins/common/wikibits.js | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/skins/common/wikibits.js b/skins/common/wikibits.js
index ca91418cb3..30686fb48e 100644
--- a/skins/common/wikibits.js
+++ b/skins/common/wikibits.js
@@ -431,7 +431,8 @@ function checkboxClickHandler(e) {
 	}
 	for (var i = start; i <= finish; ++i ) {
 		checkboxes[i].checked = endState;
-		if( i > start ) checkboxes[i].onchange(); // fire triggers
+		if( i > start && typeof checkboxes[i].onchange == 'function' )
+			checkboxes[i].onchange(); // fire triggers
 	}
 	lastCheckbox = this.index;
 	return true;
-- 
2.20.1