var plat = (navigator.userAgent.indexOf("Win") >= 0);
if(plat){
document.write('<link rel="stylesheet" href="css/font_win.css" type="text/css" charset="UTF-8" media="all">');
}else{
document.write('<link rel="stylesheet" href="css/font_mac.css" type="text/css" charset="UTF-8" media="all">');
}