function cacheMontre( div ) { 
   var element = document.getElementById(div);
   if ( element.style.display=="block") element.style.display="none"; 
   else element.style.display="block";
}


function cacheMontre2( div ) { 
   var element = document.getElementById(div);
   if ( element.style.display=="block") element.style.display="none"; 
   else element.style.display="block";
}