Oops. Internet Explorer and Vista (or Windows 7) - we have a known problem here. Chances are Vista is running IE
in protected mode which means that the Java applet used by this page will not be able able to talk to ping.exe on
your computer. Sorry. This probably won't work.
Target IP address:
Uh-oh. Java's sort of mandatory for this one.
No Java support was detected in your browser, or you forgot to grant it sufficient security privileges.
The bottom line is, you need Java 1.4 or later, and you also need to OK the security dialog so
the signed code can run. Signed code is needed for a variety of reasons - none of which entails
running nasty stuff on your computer.
If you're curious, you can read more about how this thing works here.