when you get the bravenet builder thing is your website automaticly copywrighted?>

for true copyright, you'd have to go through the official channels and pay some money.

if its something unique that you created and can prove the time/place of its creation as well, then you may have some basis to stand on otherwise.

Copyright law varies from country to country.

Bravenet does not acquire any intellectual property from your site, other questions should be referred to a suitable legal adviser in your own jurisdiction.

Using the Bravenet builder thing, has nothing to do with copyrighting. In the USA, almost everything created privately and originally after April 1, 1989 is copyrighted and protected. No copyright notice is needed, and a paid registration is not required. However, if you envision legal proceedings a copyright notice helps, and so does registration.

The key words in this instance are "privately" and "originally". This means you can't post a copyright notice on anything. It must be fixed and in tangible form. You can't copyright facts or ideas. Try this link to 10 Big Myths about copyright explained for more information.

If you have other concerns, follow Peters advice, and seek legal council.