What java plugins i needed to install?

[James Ng Yuen Sum <james_nghk_debian_user@yahoo.com.hk>]

Hi,

If i am using mozilla to view websites and encounter the following
problem, what java plugins i needed to install?

"This page contains information of a type (application/x-java-vm) that
can only be viewed with the appropriate Plug-in."

Regards,
James Ng