From ac0ffe13d9f517da8d35d386c9c75f2f25b20039 Mon Sep 17 00:00:00 2001
From: jez
Date: Mon, 3 Jan 2011 18:49:55 +0800
Subject: Prevent a referenceError.

It occasionally happens when hint mode is activated too early.
---
 linkHints.js | 8 +++++++-
 1 file changed, 7 insertions(+), 1 deletion(-)

diff --git a/linkHints.js b/linkHints.js
index c0f5280f..ca5d29dd 100644
--- a/linkHints.js
+++ b/linkHints.js
@@ -100,7 +100,13 @@ var linkHintsBase = {
     this.hintMarkerContainingDiv.className = "internalVimiumHintMarker";
     for (var i = 0; i < this.hintMarkers.length; i++)
       this.hintMarkerContainingDiv.appendChild(this.hintMarkers[i]);
-    document.documentElement.appendChild(this.hintMarkerContainingDiv);
+
+    // sometimes this is triggered before documentElement is created
+    // TODO(int3): fail more gracefully?
+    if (document.documentElement)
+      document.documentElement.appendChild(this.hintMarkerContainingDiv);
+    else
+      this.deactivateMode();
   },
 
   /*
-- 
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