//work out which style sheet to use
	isNN7 = (document.getElementById)?true:false;
	isIE5 = (document.all && document.getElementById)?true:false;
	isIE4 = (document.all && !document.getElementById)?true:false;
	isNN4 = (document.layers)?true:false;
	if(isIE5) {
		document.write('<link rel="stylesheet" href="/4car/media/css/4car.css">');
	}
	if(isIE4) {
		document.write('<link rel="stylesheet" href="/4car/media/css/4car_oldie.css">');
	}
	if(isNN4) {
		document.write('<link rel="stylesheet" href="/4car/media/css/4car_ns.css">');
	}
	if(isNN7) {
		document.write('<link rel="stylesheet" href="/4car/media/css/4car.css">');
	}
	
	if(window.location.href.match('readers-drives.jsp')){
		document.write('<link rel="stylesheet" href="/4car/media/css/table_fix.css">');
	}