From e17772c83008f9c74f15ab5235cf8634d2773322 Mon Sep 17 00:00:00 2001
From: Jeremy Ruston <jeremy@osmosoft.com>
Date: Wed, 7 Mar 2012 17:40:59 +0000
Subject: [PATCH] Added domContains()

Lots of event handlers need this
---
 js/Utils.js | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/js/Utils.js b/js/Utils.js
index dbeac64a5..534d491de 100755
--- a/js/Utils.js
+++ b/js/Utils.js
@@ -228,4 +228,14 @@ utils.nextTick = function(fn) {
 	}
 };
 
+/*
+Determines whether element 'a' contains element 'b'
+Code thanks to John Resig, http://ejohn.org/blog/comparing-document-position/
+*/
+utils.domContains = function(a,b) {
+	return a.contains ?
+		a != b && a.contains(b) :
+		!!(a.compareDocumentPosition(b) & 16);
+};
+
 })();