function bookmark(url, description) 
{
netscape="First click OK and then type CTRL+D to bookmark this site (or on a Mac type CMND+D)." 

if (navigator.appName=='Microsoft Internet Explorer') 
{ window.external.AddFavorite(url, description); 
} else if (navigator.appName=='Netscape') 
{
alert(netscape); 
}
}