var isNav, isNav6, isIE, isNavMac
	
	if (parseInt(navigator.appVersion) >= 4) {
	
		if (navigator.appName == "Netscape") {		
		
			if (parseInt(navigator.appVersion) <= 4) {
				isNav = true;
				if (navigator.platform.substring(0,1) == "M") {
					isNav = false;
					isNavMac = true;
				}
			} else {
				isNav6 = true;
				if (navigator.platform.substring(0,1) == "M") {
					isNav = false;
					isNavMac = true;
				}
			}			
			
		} else {
			isIE = true;				 
		}
		
	} else if (!isNav && !isIE) {
	}	

	if (isIE) {
		document.write('<LINK REL="stylesheet" HREF="default.css" TYPE="text/css">');
	} else if (isNav) {
		document.write('<LINK REL="stylesheet" HREF="default-nn.css" TYPE="text/css">');
	} else if (isNav6) {
		document.write('<LINK REL="stylesheet" HREF="default.css" TYPE="text/css">');
	} else if (isNavMac) {
		document.write('<LINK REL="stylesheet" HREF="default.css" TYPE="text/css">');
	} else {
		document.write('<LINK REL="stylesheet" HREF="default.css" TYPE="text/css">');
	}