IE6 friendly reminder

I remember a while back I came across a Javascript that replace a webpage with a friendly message when one's browsing in IE6. The message mainly says IE6 is not suitable for browsing this website along with links to the latest Firefox, Safari and Chrome download. I can't remember the site or the keyw开发者_JAVA百科ord that I google for. Anybody has seen something similar?

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There are several. Check out:

IE6 Update Warning: 7 Ways to Tell Your Site Visitors to Upgrade

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I don't know any site in particular (although I thought Google did this actually). However, if you're trying to reproduce the same effect on your site, what you want to do is use conditional comments:

http://reference.sitepoint.com/css/conditionalcomments

The short version is:

<!--[if lt IE 7 ]>
  <p>Only less than IE 7 will see this</p>
<![endif]-->