wgalerie = function (num, images, url_retour) {
	var largeur = 500;
	var hauteur = 580;
	var options = 'scrollbars=yes,resizable=yes';
	var x = window.screenX;
	if (isFinite(x) == false){ x = 0;}
	var y = window.screenY;
	if (isFinite(y) == false){ y = 0;}
	var H = window.outerHeight;
	if (isFinite(H) == false){ H = screen.height;}
	var L = window.outerWidth;
	if (isFinite(L) == false){  L= screen.width;}
	var left = Math.round(x+((L-largeur)/2));
	var top = Math.round(y+((H-hauteur)/2));
	var page = 'spip.php?page=wgalerie&num='+num+'&images='+images+'&ret='+url_retour;
 	win =  window.open(page,"popup","top="+top+",left="+left+",width="+largeur+",height="+hauteur+","+options);
 	win.focus();
}