// JavaScript Document
function visibilite(thingId)
{
var targetElement;
targetElement = document.getElementById(thingId) ;
if (targetElement.style.display == "none")
{
targetElement.style.display = "" ;
} else {
targetElement.style.display = "none" ;
}
}


function visibilite2(thingId,src)
{
var targetElement;
targetElement = document.getElementById(thingId) ;

if (targetElement.style.display == "none"){
targetElement.style.display = "" ;
document.getElementById('categories').style.visibility="hidden";
document.getElementById('img_chap').src = "./images/"+src+".jpg";

}
else {
document.getElementById('categories').style.visibility="visible";
targetElement.style.display = "none" ;
}

}