function getBrowserInfo() {
	var t, v = undefined;
	if (window.chrome) t = 'Chrome';
	else if (window.opera) t = 'Opera';
	else if (window.sidebar) t = 'Firefox';
	else if (document.all) {
		t = 'IE';
		var nv = navigator.appVersion;
		var s = nv.indexOf('MSIE') + 5;
		v = nv.substring(s, s + 1);
	}
	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 == 'Firefox') window.sidebar.addPanel(title, url, '');
	else alert('Нажмите CTRL-D, чтобы добавить страницу в закладки.');
	return false;
}