From 1f4f0eacc2638f1050b096f04468e3edfce2d1e6 Mon Sep 17 00:00:00 2001
From: luccioman <luccioman@users.noreply.github.com>
Date: Tue, 29 Nov 2016 02:11:44 +0100
Subject: [PATCH] Fixed a JS undefined error case, occurring when search field
 is empty.

---
 htroot/yacysearchtrailer.html | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/htroot/yacysearchtrailer.html b/htroot/yacysearchtrailer.html
index 5511c8de87..6fae522aa7 100644
--- a/htroot/yacysearchtrailer.html
+++ b/htroot/yacysearchtrailer.html
@@ -1,5 +1,5 @@
 <script>
-  if (document.getElementById("progressbar").getAttribute('class') != "progress-bar progress-bar-success") {
+  if (document.getElementById("progressbar") != null && document.getElementById("progressbar").getAttribute('class') != "progress-bar progress-bar-success") {
 	  document.getElementById("progressbar").setAttribute('style',"width:100%");
       document.getElementById("progressbar").setAttribute('style',"transition:transform 0s;-webkit-transition:-webkit-transform 0s;");
 	  document.getElementById("progressbar").setAttribute('class',"progress-bar progress-bar-success");