Which is a better way to detect a clients user-agent?

Posted by westoque on Stack Overflow See other posts from Stack Overflow or by westoque
Published on 2010-06-03T18:30:12Z Indexed on 2010/06/03 18:34 UTC
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JavaScript

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ruby-on-rails

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ruby

I am interested if which would be the best place to detect the clients user-agent, client-side (javascript) or server-side? I brought up the question due to the fact that some IE8 users are getting a message saying they're using IE6

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