Macintosh Users
  Netscape Navigator/Communicator does not currently support Java 1.1. For best 
  results, use Internet 
  Explorer 4.0 with Apple's MRJ 
  2.0. After you have installed Internet Explorer and MRJ 2.0, set the JAVA 
  preferences in Internet Explorer to use Apple MRJ. 
Windows 95/98/NT and UNIX users
  If you are using Navigator/Communicator please visit the Netscape 
  Communicator 4.0 Download Central for JDK 1.1. 
  If you are using Internet Explorer, then use version 
  4.0.