function bookmark() {

var IE = navigator.appName.match(/(Microsoft Internet Explorer)/gi),
    NS = navigator.appName.match(/(Netscape)/gi),
    OP = navigator.appName.match(/(Opera)/gi),
    BK = document.getElementById('bookmark');

    if(IE && document.uniqueID){
     window.external.AddFavorite('http://www.mycologneandperfume.com/','My Cologne and Perfume');
    }

    else if(OP || IE && !document.uniqueID){
     alert('Your browser requires that you\nPress Ctrl & T to Bookmark this page.');
    }

    else if(NS){
     alert('Your browser requires that you\nPress Ctrl & D to Bookmark this page.');
    }
}