to allow applets to access System Properties in JDK 1.1, you need to
sign your applet:
http://java.sun.com/security/signExample
if you use JDK 1.2 (the Java 2 platform), you simply need to grant
the correct permissions to your applet:
http://java.sun.com/products/jdk/1.2/docs/guide/security/index.html
thanks,
charlie