Redirect by browser language: SE friendly?

Do javascript redirects affect SE ranking?

[spentrent]

Will using javascript to redirect a surfer by browser language affect my site's SE rankings?

I've gotten the impression from surfing SEO resources that "javascript is bad" but I haven't been able to qualify that statement.

Any opinions? I'd hate for an option that potentially makes my surfers' experience BETTER to hurt me with the SEs.

[spentrent]

THANKS WEBMASTERWORLD!

Teach your moderators that a KEYWORD does not equal a TOPIC.

Now the search engine optimizers who might have an opinion on this will never see it!

Where did I ask anything about Javascript syntax?

THANKS!