The pages completely reorganized on the site.

[Wensong Zhang <wensong@xxxxxxxxxxxx>]

The pages have been completely reorganized on the site by using of frames.
It would be easy to navigator through the site, guys wouldn't get lost
there. :-)

And, a high-availability page, comparision of virtual server via NAT and
virtual server via IP tunneling, links pages have been added.

It is worth having a look at them. :-)