var nm=navigator.appName;
NS=((nm.indexOf("Netscape")>-1||nm.indexOf("Netscape")>-1)?1:0);

var IE4 = (document.all);

function addfavorite(){
	if (IE4) {
	window.external.AddFavorite(location.href, document.title);
	}
	if (NS) {
	alert(" For Netscape users, please press Ctrl+D to add this page to your bookmarks.");
	}
}