var numPrec=0;

function Montre(num) {
  if (num!=numPrec) {
    document.getElementById("Det"+numPrec).style.visibility="hidden";
    document.getElementById("Tit"+numPrec).style.top="90px";
    document.getElementById("Tit"+numPrec).style.backgroundColor ="#FFA";
    document.getElementById("Tit"+num).style.top="100px";
    document.getElementById("Tit"+num).style.backgroundColor="#EFE";
    document.getElementById("Det"+num).style.visibility="visible";
    numPrec=num; } }