var name = navigator.appName;
var vers = navigator.appVersion;
vers = vers.substring(0,1);

if ((name != "Microsoft Internet Explorer") && (vers == "4")){
themessage_a = "You appear to be using Netscape ";
themessage_b = ". If you have the option, this site works best with IE5+ or Netscape 6+";
document.write('<tr><TD bgcolor="Silver" align="left" valign="top"> ');
document.write('<font color = maroon><b>');
document.write('Netscape '+ vers +' Browser');
document.write('</b><p></font>');
document.write('' + themessage_a  + vers + themessage_b + '');
document.write('<p>&nbsp;</p></td></tr>');}