diff --git a/resources/common.js b/resources/common.js
index d34e259..185eb7c 100644
--- a/resources/common.js
+++ b/resources/common.js
@@ -387,7 +387,7 @@ function onWindowReady() {
     });
     $('a').click(function() {
         var href = $(this).attr('href');
-        if (href === '#' || href.startsWith("javascript")) {
+        if (!href || href === '#' || href.startsWith("javascript")) {
             return;
         }