var Win=(navigator.userAgent.indexOf("Win")!=-1);
var Mac=(navigator.userAgent.indexOf("Mac")!=-1);
var VB=(navigator.userAgent=="VBBrowser");
if
(Win || VB)
{document.write('<link rel="stylesheet" href="/zaidan/css/win.css" type="text/css">');}
else if
( Mac )
{document.write('<link rel="stylesheet" href="/zaidan/css/mac.css" type="text/css">');}
else
{document.write('<link rel="stylesheet" href="/zaidan/css/win.css" type="text/css">');}