// OS�U�蕪�� 

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


function setCSS(theURL)
{
var os      = getOSType();

var dirName = theURL;
if (os == "MacOS")   dirName += "css/style_mac.css";
if (os == "Windows") dirName += "css/style_win.css";

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