From bbeda61ab3d8d49de87c4c4694cb8638338bb20d Mon Sep 17 00:00:00 2001
From: "Fedor A. Fetisov" <faf@ossg.ru>
Date: Thu, 18 Mar 2021 02:55:54 +0300
Subject: [PATCH] Make plugin compatible with tracking for all types of button

---
 js/refresh.js | 7 +++++--
 1 file changed, 5 insertions(+), 2 deletions(-)

diff --git a/js/refresh.js b/js/refresh.js
index 18c1022..90ada10 100644
--- a/js/refresh.js
+++ b/js/refresh.js
@@ -1,7 +1,10 @@
 (function(Mibew) {
     Mibew.APIFunctions.refreshButton = function(data) {
-        // Refresh the button image
-        var img = document.getElementById("mibew-agent-button").getElementsByTagName("img")[0];
+        // Refresh the button image (if exists)
+        var button = document.getElementById("mibew-agent-button");
+        if (!button) { return; }
+        var img = button.getElementsByTagName("img")[0];
+        if (!img) { return; }
         var originalSrc = img.src.replace(/&dummy=\d+/, '');
         img.src = originalSrc + "&dummy=" + (new Date()).getTime();