Possible Duplicates:
How to encrypt my HTML, PHP & JavaScript?
How to disable or encrypt “View Source” for my site
If we click to View Page Source option of browser then you can not only view the code but also copy and reuse as your need. But some time you don't like to forward your code without permission, so how can you hide your web page source code form users so that s/he could not copy your code without your permission.
I visited it a website
and if you view it's source code and paste on a web supported file (html, htm, php, etc) then you can not edit some of the text as well as you are not allowed to access some css.