JavaScript add bookmark

      /**
* Copyright 2010 by GlamThumbs Team.
*
* This is an example to demostrate the BookmarkApp.js by GlamThumbs Team.
* Reference: http://glamthumbs.com/BookmarkApp.js
* Reference: http://stackoverflow.com/questions/992844/add-to-browser-favorites-bookmarks-from-javascript-but-for-all-browsers-mine-doe
*
*/
BookmarkApp = function () {
var isIEmac = false; /*@cc_on @if(@_jscript&&!(@_win32||@_win16)&&(@_jscript_version<5.5)) isIEmac=true; @end @*/
var isMSIE = /*@cc_on!@*/0;
var cjTitle = document.title; // Bookmark title
var cjHref = location.href; // Bookmark url

function hotKeys() {
var ua = navigator.userAgent.toLowerCase();
var str = '';
var isWebkit = (ua.indexOf('webkit') != - 1);
var isMac = (ua.indexOf('mac') != - 1);

if (ua.indexOf('konqueror') != - 1) {
str = 'CTRL + B'; // Konqueror
} else if (window.home || isWebkit || isIEmac || isMac) {
str = (isMac ? 'Command/Cmd' : 'CTRL') + ' + D'; // Netscape, Safari, iCab, IE5/Mac
}
return ((str) ? 'Press ' + str + ' to bookmark this page.' : str);
}

function isIE8() {
var rv = -1;
if (navigator.appName == 'Microsoft Internet Explorer') {
var ua = navigator.userAgent;
var re = new RegExp("MSIE ([0-9]{1,}[\.0-9]{0,})");
if (re.exec(ua) != null) {
rv = parseFloat(RegExp.$1);
}
}
if (rv > - 1) {
if (rv >= 8.0) {
return true;
}
}
return false;
}

function addBookmark(a) {
try {
if (typeof a == "object" && a.tagName.toLowerCase() == "a") {
a.style.cursor = 'pointer';
if ((typeof window.sidebar == "object") && (typeof window.sidebar.addPanel == "function")) {
window.sidebar.addPanel(cjTitle, cjHref, ""); // Gecko
return false;
} else if (isMSIE && typeof window.external == "object") {
if (isIE8()) {
window.external.AddToFavoritesBar(cjHref, cjTitle); // IE 8
} else {
window.external.AddFavorite(cjHref, cjTitle); // IE <=7
}
return false;
} else if (window.opera) {
a.href = cjHref;
a.title = cjTitle;
a.rel = 'sidebar'; // Opera 7+
return true;
} else {
alert(hotKeys());
}
} else {
throw "Error occured.\r\nNote, only A tagname is allowed!";
}
} catch (err) {
alert(err);
}
}

return {
addBookmark : addBookmark
}
}();

<html>
  <head>
    <title></title>
    <script type="text/javascript" src="http://qwweee.myweb.hinet.net/scripts/BookmarkApp.js"></script>
  </head>
  <body>
    <p><a href="javascript:void(0)" onClick="return BookmarkApp.addBookmark(this)">bookmark me</a></p>
  </body>
<html>


Reference : http://eureka.ykyuen.info/2011/07/21/javascript-add-to-bookmark/