var txt = "bookmark"; 
var txt2 = "this site";
var url = "http://www.sites.com"; 
var who = "Sites.com"; 

var ver = navigator.appName; 
var num = parseInt(navigator.appVersion); 
if ((ver == "Microsoft Internet Explorer")&&(num >= 4)) { 
document.write('<div class="gsmaller"><A HREF="javascript:window.external.AddFavorite(url,who);" '); 
document.write('onMouseOver=" window.status='); 
document.write("txt; return true "); 
document.write('"onMouseOut=" window.status='); 
document.write("' '; return true "); 
document.write('"class="graylinks">'+ txt + '</a> '+ txt2 + '</div>'); 
}else{ 
txt += " (Ctrl+D)"; 
document.write('<div class="gsmaller">'+txt+'</div>'); 
}