// JavaScript Document
var visible=new Array();

function cacher(un_id){
	if (document.getElementById) {
		document.getElementById(un_id).style.display="none";
	}
	else if(document.all){
		document.all[un_id].style.display="none";
	}
	visible[un_id]=false;
};

function afficher(un_id){
	if (document.getElementById) {document.getElementById(un_id).style.display="block";}
	else if(document.all){document.all[un_id].style.display="block";}
	visible[un_id]=true;
};

function alterner(un_id){
	if (visible[un_id]) {cacher(un_id);} else {afficher(un_id);}
};