var stylesheet ="";
var brVersion = navigator.appVersion.charAt(0);

if(navigator.platform == "Win32"){
if((navigator.appName == "Microsoft Internet Explorer") && (brVersion >=4)){
stylesheet = "http://www.aca.or.jp/css/ie_win";
} else if(navigator.appName == "Netscape") {
stylesheet = "http://www.aca.or.jp/css/nn_win";
}
} else if(navigator.platform == "MacPPC"){
if(navigator.appName == "Netscape"){
stylesheet = "http://www.aca.or.jp/css/nn_mac";
} else if(navigator.appName == "Microsoft Internet Explorer") {
stylesheet = "http://www.aca.or.jp/css/ie_mac";
}
}

if(stylesheet != ""){
document.write('<meta http-equiv="Content-Style-Type" content="text/css">\n');
document.write('<link rel="stylesheet" type="text/css" href="'+stylesheet+'.css">');
}
//