function getOSType(){
    var uAgent  = navigator.userAgent.toUpperCase();
    if (uAgent.indexOf("MAC") >= 0) return "MacOS";
    if (uAgent.indexOf("WIN") >= 0) return "Windows";
    if (uAgent.indexOf("X11") >= 0) return "UNIX";
    return "";
}

function getBrowserName() {
	var aName  = navigator.appName.toUpperCase();
	if (aName.indexOf("NETSCAPE") >= 0)  return "Netscape";
	if (aName.indexOf("MICROSOFT") >= 0) return "Explorer";
	return "";
}

function getBrowserVersion() {
	var browser = getBrowserName();
	var version = 0;
	var s = 0;
	var e = 0;
	var appVer  = navigator.appVersion;
	if (browser == "Netscape"){
		s = appVer.indexOf(" ",0);
		version = eval(appVer.substring(0,s));
		if (version >= 5) version++;
	}
	if (browser == "Explorer"){
		appVer  = navigator.userAgent;
		s = appVer.indexOf("MSIE ",0) + 5;
		e = appVer.indexOf(";",s);
		version = eval(appVer.substring(s,e));
	}
	return version;
}

os = getOSType();
browser = getBrowserName();
version = getBrowserVersion();

dirName = "/common/css/content.css";

/* winだったらwin用のcss */
if(os == "Windows"){
	dirName = "/common/css/cont_win.css";
}else if(os == "MacOS"){
	dirName = "/common/css/cont_mac.css";
}else{
	dirName = "/common/css/cont_default.css";
}

document.writeln("<link rel='stylesheet' href='"+dirName+"' type='text/css'>");