function popup(choix,nom,source,w,h){
	var popup=document.getElementById('popup');
	var fermer=document.getElementById('fermer');
	if (popup){
		popup.style.display='block';
		popup.style.width=w+"px";
		popup.style.height=h+"px";
		document.images[nom].src='img/'+choix+'/'+source;
	};
	if (popup){popup.onclick=function() {popup.style.display='none';};};
}