function display(li){
	initDisplay();
	li.className = "current";
}
function makeItActive(h2){
	initDisplay();
	var div = h2.parentNode;
	div.className = "active";
}
function initDisplay(){
	document.getElementById("biblio").className = "";
	document.getElementById("actu").className = "";
	var ul = document.getElementById("galery");
	var lis = ul.getElementsByTagName("li");
	for ( var i = 0 ; i < lis.length ; i++ ){
		lis[i].className = "";
	}
}