var LoadCSS;
if ((navigator.appVersion.indexOf("4.") != -1) && (navigator.appName.indexOf("Netscape") != -1)){
	//netscape
	LoadCSS = "ns4.css";
} else {
	//every thing else
	LoadCSS = "style.css";
}
document.write('<LINK HREF="css/' + LoadCSS + '" REL="styleSheet" TYPE="text/css">');