Originally Posted by SEO

I had a website hijacked a few years ago (2 websites actually)...

One of them displayed my site within a frame on their site and displayed their Google Adsense code above all of my pages. A code very similar to the one posted above helped me with that problem (although by the time I figured it out it was too late, the damage had been done).

I also had somebody else doing a 302 meta refresh to one of my websites.

I found some helpful information on these pages:
Stop 302 Redirects and Scrapers from Hijacking Web Page PR - Page Rank
How to Find a Hijacker using 302 Redirects and Report Them
How to Report a 302 Redirect or Web Page Hijackings and Scapers
How to Stop Content Theft
How to Find a Scraper Directory and Report them to Google

For a "break out of frames script" look here:
I Hate Frames

Or here is a good one:
<script type="text/javascript">
if(top!= self) top.location.href = self.location.href
</script>

I hope this helps... I know how disheartening it can be when some mongrel hijacks your website.