var ua;
ua = navigator.userAgent;
if(ua.indexOf("Win") >=0){
document.write('<LINK rel="stylesheet" href="../css/win.css" type="text/css">');
}

else if(ua.indexOf("Mac") >=0){
document.write('<LINK rel="stylesheet" href="../css/main.css" type="text/css">');
}

else{
document.write('<LINK rel="stylesheet" href="../css/main.css" type="text/css">');
}