function setStylesheet() {
var plattform;
var bversion;
var pc = (navigator.appVersion.indexOf('Win') != -1);
var iexp = (navigator.appName.indexOf('Microsoft') != -1);
var ns = (navigator.appName.indexOf('Netscape') != -1);
var linkText;
var bVersion = navigator.appVersion.substring(0,3); 
	if (pc && ns){
	linkText="<LINK REL='stylesheet' TYPE='text/css' HREF='../css/ns.css'>";
	document.write(linkText);
	}
	if (pc && iexp && bVersion >= 4 ){
	linkText="<LINK REL='stylesheet' TYPE='text/css' HREF='../css/ie.css'>";
	document.write(linkText);
	}
	if (!pc){
	linkText="<LINK REL='stylesheet' TYPE='text/css' HREF='../css/mac.css'>";
	document.write(linkText);
	}
	}
setStylesheet();