var Bookmark = function() {
	var browser = navigator.userAgent.toLowerCase();
	var keystroke = ((browser.indexOf('mac')!=-1) ? 'Command/Cmd':'STRG') + ' + D';	
	var canBookmarkPage = (document.all);

	return {
		bookmarkPage : function(url, title) {
			if(this.canBookmark()) {
				window.external.AddFavorite(url, title);
				return true;
			} else {
				return false;
			}
		},
		
		canBookmark : function () {
			return canBookmarkPage;
		},
		
		getKeystroke : function () {
			return keystroke;
		}
	};
}();