Extending Moderizer so that is adds browsers and operating systems

Extending Moderizer

(function($){
  $(function() {
    var userAgent = navigator.userAgent.toLowerCase();
    jQuery.browser = {
      chrome: /chrome/.test( userAgent ),
      safari: /webkit/.test( userAgent ) && !/chrome/.test( userAgent ),
      opera: /opera/.test( userAgent ),
      msie: /msie/.test( userAgent ) && !/opera/.test( userAgent ),
      mozilla: /mozilla/.test( userAgent ) && !/(compatible|webkit)/.test( userAgent )
    };
    $.each($.browser, function(i, val) { if(val) { $("html").addClass(i) } });
    
    var osname = "unknownos";
    if ( navigator.appVersion.indexOf("Win") !=-1 ) osname = "windows";
    if ( navigator.appVersion.indexOf("Mac") !=-1 ) osname = "mac";
    if ( navigator.appVersion.indexOf("X11") !=-1 ) osname = "unix";
    if ( navigator.appVersion.indexOf("Linux") !=-1 ) osname = "linux";
    $("html").addClass(osname);
  });
})(jQuery);