function checkAll(Ajouter) { 
 for (i=0, n=Ajouter.elements.length; i<n; i++){ 
   var objName = Ajouter.elements[i].name; 
   var objType = Ajouter.elements[i].type; 
   if (objType = "checkbox"){ 
     box = eval(Ajouter.elements[i]); 
     if (box.checked == false) box.checked = true; 
   } 
 } 
} 
  
function unCheckAll(Ajouter) { 
 for (i=0, n=Ajouter.elements.length; i<n; i++){ 
   var objName = Ajouter.elements[i].name; 
   var objType = Ajouter.elements[i].type; 
   if (objType = "checkbox"){ 
     box = eval(Ajouter.elements[i]); 
     if (box.checked == true) box.checked = false; 
   } 
 } 
} 
  
function switchAll(Ajouter) { 
 for (i=0, n=Ajouter.elements.length; i<n; i++){ 
   var objName = Ajouter.elements[i].name; 
   var objType = Ajouter.elements[i].type; 
   if (objType = "checkbox"){ 
     box = eval(Ajouter.elements[i]); 
     box.checked = !box.checked; 
   } 
 } 
}