From e276946939d737f58e904c94fa067e937a263d1e Mon Sep 17 00:00:00 2001
From: Dan Vanderkam <danvk@google.com>
Date: Mon, 13 Aug 2012 17:53:23 -0400
Subject: [PATCH] Fix issue 322: calling destroy() results in an error in IE8

---
 dygraph-utils.js | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/dygraph-utils.js b/dygraph-utils.js
index e942f0c..dd8c620 100644
--- a/dygraph-utils.js
+++ b/dygraph-utils.js
@@ -177,7 +177,12 @@ Dygraph.removeEvent = function addEvent(elem, type, fn) {
   if (elem.removeEventListener) {
     elem.removeEventListener(type, fn, false);
   } else {
-    elem.detachEvent('on'+type, elem[type+fn]);
+    try {
+      elem.detachEvent('on'+type, elem[type+fn]);
+    } catch(e) {
+      // We only detach event listeners on a "best effort" basis in IE. See:
+      // http://stackoverflow.com/questions/2553632/detachevent-not-working-with-named-inline-functions
+    }
     elem[type+fn] = null;
   }
 };
-- 
2.7.4