Sorry, typo:

One way to HIDE the biggest part of a website can be accomplished by showinbg a frame within a frame.

Most visiting your website would only be able to see the source of your first frame.

that will only work for so long... you can go through those frames with ease....

if you really and I mean really want to stop people from seeing you source one of two options
1. encypt the source code useing jvscript
2. encrypt your source using php

either one of these can also still be by passed however any one who just knwos the basics and possibly know a little bit f andvaced stuff this will intimmidate people from trying to get your stuff