mac = (navigator.userAgent.indexOf('Mac') != -1)?true:false;
ie = (navigator.userAgent.indexOf('MSIE') != -1)?true:false;
netscape = (navigator.appName.indexOf('Netscape') != -1)?true:false;
ie5 = (navigator.userAgent.indexOf('MSIE 5') != -1)?true:false;
nn6 = (navigator.appVersion.indexOf("5.0") !=-1)?true:false;

document.write("<STYLE TYPE='text/css'><!--");

//Mac・Win共通//トップページ
document.write("a:link {color:#666666; text-decoration:none;}");
document.write("a:visited {color:#000000; text-decoration:none;}");
document.write("a:hover {color:#990000; text-decoration:underline}");
document.write("--></style>");