diff --git a/frontend/web/js/script.js b/frontend/web/js/script.js
index e29cc59..304a0a9 100755
--- a/frontend/web/js/script.js
+++ b/frontend/web/js/script.js
@@ -348,8 +348,9 @@ $(function() {
             console.log(max, min);
             var href = window.location.href;
             var question = href.indexOf('?');
+            var queryString = '';
             if (question !== -1) {
-                var queryString = href.substr(question);
+                queryString = href.substr(question);
                 href = href.substr(0, question);
             }
             var count = 0;
--
libgit2 0.21.4