First step in setting up JCVS is to have JAVA install. Unfortunately JCVS will not just run in your favorate browser, but requires full blown JAVA. I've only tried it with 1.2 but 1.1 may work. At a minimun you'll need the runtime environment (JRE), which for Windows 9x, NT(x86 only), Linux and Solaris can be downloaded at:

http://www.javasoft.com/products/jdk/1.2/jre/index.html

If you have another platform they available at

http://www.javasoft.com/cgi-bin/java-ports.cgi

Note that the JDK (java development environment) includes JRE so that will work too, its just more than you need for JCVS. Follow the installation instructions that come with each platform.