diff --git a/app/scodoc/sco_groups_view.py b/app/scodoc/sco_groups_view.py
index 02185fd8..598ede76 100644
--- a/app/scodoc/sco_groups_view.py
+++ b/app/scodoc/sco_groups_view.py
@@ -224,14 +224,13 @@ def menu_groups_choice(
     groups_infos,
     submit_on_change=False,
     default_deselect_others=True,
-    html_export=True,
 ):
     """Menu pour selection groupes
     group_ids est la liste des groupes actuellement sélectionnés
     et doit comporter au moins un élément, sauf si formsemestre_id est spécifié.
     (utilisé pour retrouver le semestre et proposer la liste des autres groupes)
 
-    Si html_export :
+    Si url_export :
         selecteur.value = &group_ids=xxx&group_ids=yyy...
     sinon :
         selecteur.value = [xxx, yyy, ...]
@@ -273,9 +272,6 @@ def menu_groups_choice(
         values=values, name="group_ids", html_id="group_ids_sel"
     )
 
-    if html_export:
-        multi_select.export_format('return "&group_ids="+values.join("&group_ids=")')
-
     if submit_on_change:
         multi_select.change_event("submit_group_selector();")
 
diff --git a/app/static/js/groups_view.js b/app/static/js/groups_view.js
index 43eb694b..40e59c83 100644
--- a/app/static/js/groups_view.js
+++ b/app/static/js/groups_view.js
@@ -23,7 +23,14 @@ function groups_view_url() {
   urlParams.delete("group_ids");
   // ajout des groupes selectionnes
   var selected_groups = document.getElementById("group_ids_sel").value;
-  url.search = urlParams.toString() + selected_groups;
+  if (Array.isArray(selected_groups)) {
+    selected_groups.forEach((value) => {
+      urlParams.append("group_ids", value);
+    });
+  } else {
+    urlParams.set("group_ids", selected_groups);
+  }
+  url.search = urlParams.toString();
   return url.href;
 }
 
@@ -61,11 +68,13 @@ function change_list_options(selected_options) {
 // Menu choix groupe:
 function toggle_visible_etuds() {
   //
-  document.querySelectorAll('.etud_elem').forEach(element => {
-    element.style.display = 'none';
+  document.querySelectorAll(".etud_elem").forEach((element) => {
+    element.style.display = "none";
   });
   var qargs = "";
-  var selectedOptions = document.querySelectorAll("#group_ids_sel option:checked");
+  var selectedOptions = document.querySelectorAll(
+    "#group_ids_sel option:checked"
+  );
   var qargs = "";
   selectedOptions.forEach(function (opt) {
     var group_id = opt.value;
@@ -79,7 +88,9 @@ function toggle_visible_etuds() {
   let input_eval = document.querySelectorAll("#formnotes_evaluation_id");
   if (input_eval.length > 0) {
     let evaluation_id = input_eval[0].value;
-    let menu_saisie_tableur_a = document.querySelector("#menu_saisie_tableur a");
+    let menu_saisie_tableur_a = document.querySelector(
+      "#menu_saisie_tableur a"
+    );
     menu_saisie_tableur_a.setAttribute(
       "href",
       "saisie_notes_tableur?evaluation_id=" + evaluation_id + qargs
diff --git a/app/static/js/multi-select.js b/app/static/js/multi-select.js
index acd2226b..38bf86c0 100644
--- a/app/static/js/multi-select.js
+++ b/app/static/js/multi-select.js
@@ -263,8 +263,20 @@ class MultiSelect extends HTMLElement {
     }
     this.dispatchEvent(new Event("change"));
 
+    // create a FormData object
+    const fd = new FormData();
+    const values = this._values();
+    // check if values is an array
+    if (Array.isArray(values)) {
+      values.forEach((value) => {
+        fd.append(this.name, value);
+      });
+    } else {
+      fd.append(this.name, values);
+    }
+
     // update the form values
-    this._internals.setFormValue(this._values());
+    this._internals.setFormValue(fd);
   }
 
   _values(newValues = null) {
diff --git a/app/views/assiduites.py b/app/views/assiduites.py
index 9e4cd77b..49b861a8 100644
--- a/app/views/assiduites.py
+++ b/app/views/assiduites.py
@@ -24,8 +24,7 @@
 #
 ##############################################################################
 
-"""Vues assiduité
-"""
+"""Vues assiduité"""
 
 import datetime
 import json
@@ -1167,7 +1166,7 @@ def signal_assiduites_group():
         formsemestre_date_fin=str(formsemestre.date_fin),
         formsemestre_id=formsemestre_id,
         gr_tit=gr_tit,
-        grp=sco_groups_view.menu_groups_choice(groups_infos, html_export=False),
+        grp=sco_groups_view.menu_groups_choice(groups_infos),
         minitimeline=_mini_timeline(),
         moduleimpl_select=_module_selector(formsemestre, moduleimpl_id),
         nonworkdays=_non_work_days(),
diff --git a/app/views/groups.py b/app/views/groups.py
index 2dc86932..bff0b468 100644
--- a/app/views/groups.py
+++ b/app/views/groups.py
@@ -41,11 +41,11 @@ def formulaire_feuille_appel(formsemestre_id: int):
         group_ids: list[int] = request.args.getlist("group_ids")
         data = {"group_ids": group_ids}
     else:
-        group_ids_str = request.form.get("group_ids")
+        group_ids_list = request.form.getlist("group_ids")
         try:
-            group_ids = [int(gid) for gid in group_ids_str.split(",") if gid]
+            group_ids = [int(gid) for gid in group_ids_list if gid]
         except ValueError as exc:
-            log(f"formulaire_feuille_appel: group_ids invalide: {group_ids_str[:100]}")
+            log(f"formulaire_feuille_appel: group_ids invalide: {group_ids_list[:100]}")
             raise ScoValueError("groupes invalides") from exc
         data = {}
 
@@ -81,6 +81,6 @@ def formulaire_feuille_appel(formsemestre_id: int):
         sco_data=ScoData(formsemestre=formsemestre),
         form=form,
         group_name=groups_infos.groups_titles,
-        grp=menu_groups_choice(groups_infos, html_export=False),
+        grp=menu_groups_choice(groups_infos),
         formsemestre_id=formsemestre_id,
     )
diff --git a/app/views/notes.py b/app/views/notes.py
index 194e5092..e3fbdf4f 100644
--- a/app/views/notes.py
+++ b/app/views/notes.py
@@ -30,6 +30,7 @@ Module notes: issu de ScoDoc7 / ZNotes.py
 
 Emmanuel Viennet, 2021
 """
+
 import html
 from operator import itemgetter
 import time