From db775859ec7ae823b731bfb04cb544ef3ae7ad3a Mon Sep 17 00:00:00 2001
From: Robert Konigsberg <konigsberg@google.com>
Date: Fri, 29 Mar 2013 18:41:43 -0400
Subject: [PATCH] Closure fix; force cast from Element to Node.

---
 dygraph-utils.js | 7 ++++---
 1 file changed, 4 insertions(+), 3 deletions(-)

diff --git a/dygraph-utils.js b/dygraph-utils.js
index 11a2fba..f53c81e 100644
--- a/dygraph-utils.js
+++ b/dygraph-utils.js
@@ -1246,10 +1246,11 @@ Dygraph.isElementContainedBy = function(containee, container) {
   if (container === null || containee === null) {
     return false;
   }
-  while (containee && containee !== container) {
-    containee = containee.parentNode;
+  var containeeNode = /** @type {Node} */ (containee);
+  while (containeeNode && containeeNode !== container) {
+    containeeNode = containeeNode.parentNode;
   }
-  return (containee === container);
+  return (containeeNode === container);
 };
 
 
-- 
2.7.4