diff --git a/static/js/main.js b/static/js/main.js
index ef81572..7c2d56c 100644
--- a/static/js/main.js
+++ b/static/js/main.js
@@ -190,7 +190,7 @@ function get_admin(type) {
                                 <div class="activity-desc">Description: <input type="text"/></div>
                                 <div class="activity-where">Lieu: <input type="text"/></div>
                                 <div class="activity-start">Début: <input type="datetime-local"/></div>
-                                <div class="activity-end">Fin: <input type="datetime-local"/></div>
+                                <div id="activity-end-add" class="activity-end">Fin: <input type="datetime-local"/></div>
                                 <span class="activity-btn">
                                     <div id="activity-btn-add">Ajouter une activité</div>
                                 </span>
@@ -210,7 +210,7 @@ function get_admin(type) {
                                         <div class="activity-desc">Description: <input type="text" value="${activityData[entry].desc}"/></div>
                                         <div class="activity-where">Lieu: <input type="text" value="${activityData[entry].where}"/></div>
                                         <div class="activity-start">Début: <input type="datetime-local" value="${toIsoString(new Date(activityData[entry].start))}"/></div>
-                                        <div id="activity-end-add" class="activity-end">Fin: <input type="datetime-local" value="${toIsoString(new Date(activityData[entry].end))}"/></div>
+                                        <div class="activity-end">Fin: <input type="datetime-local" value="${toIsoString(new Date(activityData[entry].end))}"/></div>
                                         <span class="activity-footer">
                                             <div class="activity-uid">UID: ${activityData[entry].activityUid}</div>
                                         </span>
@@ -270,8 +270,8 @@ function refreshListener() {
             success: function (data) {
                 if(data.success) {
                     let btnElems = $("#"+uid).children()[6];
-                    btnElems.children()[0].style.display = "none";
-                    btnElems.children()[2].style.display = "flex";
+                    btnElems.children()[0].css("display", "none");
+                    btnElems.children()[2].css("display", "flex");
                 } else {
                     if (data.why == "Not authentificated") {
                         show_page('#login-page');
@@ -450,11 +450,11 @@ function refreshListener() {
             }
         });
     })
-    $("activityType").on("change", function() {
+    $("#activityType").on("change", function() {
         if (this.value == "treasure") {
-            $("#activity-end-add").style.display = "none";
+            $("#activity-end-add").css("display", "none");
         } else if (this.value == "event") {
-            $("#activity-end-add").style.display = "flex";
+            $("#activity-end-add").css("display", "flex");
         }
     })
     $(".activity-btn-add").click((e) => {