(function () {
    var u = navigator.userAgent.toLowerCase(),

    is = function(t){return (u.indexOf(t)!=-1)};

    document.getElementsByTagName("html")[0].className += ([
   (!(/opera|webtv/i.test(u))&&/msie (\d)/.test(u))?('ie ie'+RegExp.$1)
     :is('firefox/2')?'gecko ff2'
     :is('firefox/3')?'gecko ff3'
     :is('gecko/')?'gecko'
     :is('opera/9')?'opera opera9':/opera (\d)/.test(u)?'opera opera'+RegExp.$1
     :is('konqueror')?'konqueror'
     :is('chrome/')?'webkit chrome'
     :is('applewebkit/')?'webkit safari'
     :is('mozilla/')?'gecko':'',
   (is('x11')||is('linux'))?' linux'
     :is('mac')?' mac'
     :is('win')?' win':''
    ].join(''));
   })();