From 8f347f1ce6323218a02dcfba5d45bf5410bd40bf Mon Sep 17 00:00:00 2001
From: Alex de Mulder <alexdemulder@gmail.com>
Date: Tue, 13 Jan 2015 18:13:17 +0100
Subject: [PATCH] fixed example

---
 examples/network/15_dot_language_playground.html | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/examples/network/15_dot_language_playground.html b/examples/network/15_dot_language_playground.html
index c4247543..c79ee3c3 100644
--- a/examples/network/15_dot_language_playground.html
+++ b/examples/network/15_dot_language_playground.html
@@ -80,7 +80,8 @@
 </table>
 
 <script type="text/javascript">
-  var network, data;
+  var network = null;
+  var data = null;
 
   var btnDraw = document.getElementById('draw');
   var txtData = document.getElementById('data');