There are other disclaimers you might want to consider. You may want to:

Restrict permissable use of material
Disclaim responsibility for errors
Disclaim all implied warranties
Disclaim responsibility for materials at linked sites

The way internet copyright works is this. As soon as the work is completed, a copyright is attached. You may or may not want to file for federal registration. Federal registration preserves statutory damages and right to legal fees if you successfully sue someone. Bear in mind that copyright notice is not a requirement to maintaining copyright protection, but it is a good idea to include copyright notice in your work.

To be effective this must contain three things.

1) the "C" in a circle, the word "Copyright" or "Copr."
2) the FIRST year of publication
3) your FULL name

Good luck, and normally a simple email will do the trick.

Kuan

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You don't need a weatherman to know which way the wind blows - Robert A. Zimmerman