var _agent = navigator.userAgent.toLowerCase();

var _win = (_agent.indexOf('win') != -1);
var _mac = (_agent.indexOf('mac') != -1);

var _brover = parseInt(navigator.appVersion);

var _ie = (_agent.indexOf('msie') != -1);
var _ns = ((_agent.indexOf('mozilla') != -1) && (_agent.indexOf('compatible') == -1));
var _nsup = (_ns && (_brover >= 5));

if(_win){
    document.write('<link rel="stylesheet" href="http://www.yasudakenji.com/lib/css/win.css" type="text/css">');
	document.write('<style type="text/css"><!--');
	document.write('body {font-family: "ＭＳ Ｐゴシック", _ゴシック, sans-serif;}');
	document.write('--></style>');
}
else{
    document.write('<link rel="stylesheet" href="http://www.yasudakenji.com/lib/css/mac.css" type="text/css">');
	document.write('<style type="text/css"><!--');
	document.write('body {font-family: "Hiragino Kaku Gothic Pro", Osaka, sans-serif;}');
	document.write('--></style>');
}