function getBrowserInfo() {
var t,v = undefined;

if (window.chrome) t = 'Chrome';
else if (window.opera) t = 'Opera';
else if (document.all) {
    t = 'IE';
    var nv = navigator.appVersion;
    var s = nv.indexOf('MSIE')+5;
    v = nv.substring(s,s+1);
}
else if (navigator.appName) t = 'Netscape';

return {type:t,version:v};
}

function bookmark(a){
var url = window.document.location;
var title = window.document.title;
var b = getBrowserInfo();

if (b.type == 'IE' && 8 >= b.version && b.version >= 4) window.external.AddFavorite(url,title);
else if (b.type == 'Opera') {
    a.href = url;
    a.rel = "sidebar";
    a.title = url+','+title;
    return true;
}
else if (b.type == "Netscape") window.sidebar.addPanel(title,url,"");
else alert("Нажмите CTRL-D, чтобы добавить страницу в закладки.");
return false;
}