function popup(url, w, h, chromeless) {
	if (chromeless == true) {
		window.open(url, "mypopup", "width=" + w + ",height=" + h + ",toolbar=no,location=no,directories=no,status=no,menubar=no,resizable=yes,scrollbars=yes");
	} else {
		window.open(url, "mypopup", "width=" + w + ",height=" + h);		
	}
}