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 DisplayTexte (tag_name,i, zone) {
   MyZone = document.getElementById(zone);
   MyList = MyZone.getElementsByTagName(tag_name);
   if (MyList[i].style.display == "block") {
       MyList[i].style.display = "none";
       for (n=0;n<MyList.length;n++) {
           if (n != i) MyList[n].style.display = "block";
       }
   }
   else {
       MyList[i].style.display = "block";
   }
}