Catch elements without id.

diff --git a/imp/js/message.js b/imp/js/message.js
index 5dd2a0f..e7777a7 100644 (file)
--- a/imp/js/message.js
+++ b/imp/js/message.js
@@ -140,6 +140,10 @@ var ImpMessage = {
     {
         var id = e.element().readAttribute('id');
 
+        if (!id) {
+            return;
+        }
+
         if (id.startsWith('flag')) {
             this.flagMessage(id.substring(4));
         } else if (id.startsWith('target')) {