function DisplayText (tag_name,i, zone) {

   MyZone = document.getElementById(zone);

   MyList = MyZone.getElementsByTagName(tag_name);

   if (MyList[i].style.display == "none") {

       MyList[i].style.display = "block";

       for (n=0;n<MyList.length;n++) {

           if (n != i) MyList[n].style.display = "none";

       }

   }

   else {

       MyList[i].style.display = "none";

   }

}

function Cacher (nom) {

     tab = document.getElementById(nom);
       
	 if (tab.style.display == "none") {
	  tab.style.display = "block";
	 }else{
	  tab.style.display = "none";
	 }   
		
}