var bookmarkurl = "http://www.romereservation.com";
var bookmarktitle = "Rome Reservation";
var booknetscape = "Press CTRL+D to add our site to your favorites.";
var bookopera = "Press CTRL+T to add our site to your favorites.";
var bookother = "An unknown browser.";

function addbookmark() {
	if (navigator.appName == "Microsoft Internet Explorer") {
		window.external.AddFavorite(bookmarkurl,bookmarktitle);
	} else if (navigator.appName == "Netscape") {
		alert (booknetscape);
	} else if (navigator.appName == "Opera") {
		alert (bookopera);
	} else alert(bookother)
}