function montreInfo(id){
    var actu = document.getElementById(id);
	var h3 = document.getElementById(id+'a');

    if (actu.style.display == "block") {
        actu.style.display = "none";
		h3.style.background="url('img/puce.gif') no-repeat #fff";
		
    }
    else {
        actu.style.display = "block";
		h3.style.background="url('img/puce.gif') no-repeat #ccc";
    } 
    
}