stylo = navigator.appName;
if (stylo == "Netscape") { 
                sCSS = '<LINK REL=StyleSheet HREF="css/netscape.css" TITLE="Main" TYPE="text/css">';
}
else {
                sCSS = '<LINK REL=StyleSheet HREF="css/explorer.css" TITLE="Main" TYPE="text/css">';
}
document.write(sCSS);