// JavaScript Document
function visiPierre(){
document.getElementById("MenuPierre").style.visibility="visible";
}
function invisiPierre(){
document.getElementById("MenuPierre").style.visibility="hidden";
}
function visiBeton(){
document.getElementById("MenuBeton").style.visibility="visible";
}
function invisiBeton(){
document.getElementById("MenuBeton").style.visibility="hidden";
}

function visiBarbecue(){
document.getElementById("MenuBarbecue").style.visibility="visible";
}
function invisiBarbecue(){
document.getElementById("MenuBarbecue").style.visibility="hidden";
}

function retour(){
	history.go(-1);
	}