var NS4=(document.layers);

function isWin95() {
if (navigator.appVersion.indexOf("95") !=-1)
return true;
else return false;
}

function isWin98() {
if (navigator.appVersion.indexOf("98") !=-1)
return true;
else return false;
}

function isPPC() {
if ((navigator.appVersion.indexOf("PPC") !=-1) || (navigator.appVersion.indexOf("Macintosh") !=-1) )
return true;
else return false;
}

function isLinux() {
if ((navigator.appVersion.indexOf("Linux") !=-1) || (navigator.appVersion.indexOf("X11") !=-1))
return true;
else return false;
}

function isNT() {
if (navigator.appVersion.indexOf("NT") !=-1)
return true;
else return false;
}

if (isWin95()) {
document.write('<link rel=stylesheet type=text/css href="/doc/styles.css">');
}
if (isWin98()) {
document.write('<link rel=stylesheet type=text/css href="/doc/styles.css">');
}
else if (isPPC()) {
document.write('<link rel=stylesheet type=text/css href="/doc/styles_1.css">');
}
else if (isLinux()) {
document.write('<link rel=stylesheet type=text/css href="/doc/styles.css">');
}
else if (isNT()) {
document.write('<link rel=stylesheet type=text/css href="/doc/styles.css">');
}
else {
document.write('<link rel=stylesheet type=text/css href="/doc/styles.css">');
}

browserName = navigator.appName;
browserVer = parseInt(navigator.appVersion);
var version="0"
  if (browserName == "Netscape" && browserVer >= 3 || browserName == "Microsoft Internet Explorer" && browserVer >= 4) version = "yes";