diff --git a/vulpes/src/main.cpp b/vulpes/src/main.cpp
index 378b12b..d1d2892 100644
--- a/vulpes/src/main.cpp
+++ b/vulpes/src/main.cpp
@@ -186,9 +186,7 @@ const char index_html[] PROGMEM = R"rawliteral(
   <script type="text/javascript">
     // Show more stuff depending on selected values
     // https://stackoverflow.com/a/24849350
-    document
-      .getElementById('message')
-      .addEventListener('change', function () {
+    show_message = function () {
           'use strict';
           var vis_message = document.querySelector('.vis_message'),   
               target = document.getElementById("message"+this.value);
@@ -198,10 +196,8 @@ const char index_html[] PROGMEM = R"rawliteral(
           if (target !== null ) {
               target.className = 'vis_message';
           }
-    });
-    document
-      .getElementById('send-program')
-      .addEventListener('change', function () {
+    }
+    show_program = function () {
           'use strict';
           var vis_program = document.querySelector('.vis_program'),   
               target = document.getElementById("program"+this.value);
@@ -211,7 +207,13 @@ const char index_html[] PROGMEM = R"rawliteral(
           if (target !== null ) {
               target.className = 'vis_program';
           }
-    });
+    }
+    document
+      .getElementById('message')
+      .addEventListener('change', show_message);
+    document
+      .getElementById('send-program')
+      .addEventListener('change', show_program);
   </script>
 </body></html>)rawliteral";