function bookmark(url,title){
	var useragent = navigator.userAgent.toLowerCase();
  if ((navigator.appName == "Microsoft Internet Explorer") && (parseInt(navigator.appVersion) >= 4)) {
  	window.external.AddFavorite(url,title);
  } else if (useragent.indexOf("firefox")!=-1) {
	alert("Press CTRL-D to bookmark in Firefox");
  } else if (useragent.indexOf("safari")!=-1) {
  	alert("Press CTRL-D to bookmark in Safari");
  } else if (useragent.indexOf("netscape")!=-1 ) {
    window.sidebar.addPanel(title,url,"");
  } else if (useragent.indexOf("opera")!=-1) {
  	alert("Press CTRL-T to bookmark in Opera");
  } else {
    alert("Press CTRL-D (Mozilla, Safari, Netscape) or CTRL-T (Opera) to bookmark");
  }
}