diff --git a/frontend/protos/index.html b/frontend/protos/index.html
index 671f142..8f20139 100644
--- a/frontend/protos/index.html
+++ b/frontend/protos/index.html
@@ -122,22 +122,22 @@
     etatSectionLog('Etat courant '+currentEtatSection);
     switch (currentEtatSection) {
       case 1 :
-        scrollToElement('#div_before_header');
-        section_header.style.display = "block";
         removeClassToElement('#div_navbar','navbar_fixed');
         removeClassToElement('#div_before_synthese','div_before_synthese_when_navbar_fixed');        
+        section_header.style.display = "block";
+        scrollToElement('#div_before_header');
         break;
       case 2 :
-        scrollToElement('#div_before_navbar');
-        section_synthese.style.display = "block";
         addClassToElement('#div_navbar','navbar_fixed');
         addClassToElement('#div_before_synthese','div_before_synthese_when_navbar_fixed');        
+        scrollToElement('#div_before_navbar');
+        section_synthese.style.display = "block";
         break;
       case 3 :
-        scrollToElement('#div_before_navbar');
-        section_synthese.style.display = "none";
         addClassToElement('#div_navbar','navbar_fixed');
         addClassToElement('#div_before_synthese','div_before_synthese_when_navbar_fixed');        
+        section_synthese.style.display = "none";
+        scrollToElement('#div_before_navbar');
         break;
       default :
         break;
@@ -170,7 +170,7 @@
   }
   
   function beforeSection(_visible) {
-    if (!_visible) changeSectionEtatUp();
+    if (!_visible) changeEtatSectionUp();
   }
   function afterSection(_visible) {
     if (_visible) changeEtatSectionDown();
@@ -195,37 +195,25 @@
   addIntersectionObserverEntry("div_before_header", beforeHeaderVisibility);
   addIntersectionObserverEntry("div_after_header", afterHeaderVisibility); 
   addIntersectionObserverEntry("div_before_navbar", beforeNavbarVisibility); 
-  //addIntersectionObserverEntry("div_after_navbar", afterNavbarVisibility); 
-
+  addIntersectionObserverEntry("div_after_navbar", afterNavbarVisibility); 
+  
+/*
   let yprev = window.pageYOffset;
   const scrollHandler = () => {
     const y = window.pageYOffset;
     const ymax = document.documentElement.scrollHeight - window.innerHeight;
 
     if (y > yprev) {
-      if (section_header.style.display !== "none") {
-        section_header.style.display="none";
-      } else {
-        if (section_synthese.style.display !== "none") {
-          section_synthese.style.display="none";
-        }
-      }
+      changeEtatSectionUp();
     } else {
-      if (y < yprev) {
-      if (section_synthese.style.display !== "block") {
-        section_synthese.style.display="block";
-      } else {
-        if (section_header.style.display !== "block") {
-          section_header.style.display="block";
-        }
-      }
+      changeEtatSectionDown();
     }
-  }
   
     yprev = Math.min(Math.max(y, 0), ymax);
   };
 
-  // window.addEventListener('scroll', throttleCallback(scrollHandler, 250));
+  window.addEventListener('scroll', scrollThrottleCallback(scrollHandler, 1000));
+*/
 
 </script>
 
diff --git a/frontend/protos/zones.js b/frontend/protos/zones.js
index 11033b8..9fd19cc 100644
--- a/frontend/protos/zones.js
+++ b/frontend/protos/zones.js
@@ -39,7 +39,8 @@ const intersectionObserver = new IntersectionObserver(handleIntersectionObserver
 		// On met la hauteur en pixel entre la fin de l'image et la ligne rouge
 		// C'est négatif parce qu'on entre à l'intérieur de l'image. Si le nombre
 		// était positif, alors la ligne rouge se retrouverait sous l'image
-		rootMargin: '-1px 0px'
+    rootMargin: '-1px 0px'
+		//rootMargin: '2px 0px'
 	});
 
 function addIntersectionObserverEntry(_id, _func)