Using $ for identifier is valid in Flash. Also, according to ECMA-262, "the dollar sign is intended for use only in mechanically generated code"(7.6 Identifiers).
http://livedocs.macromedia.com/flash/8/main/00001197.html

But I do not use it in Flash because $ has special meaning in other languages and it might confuse those who read my code.
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Greg Burch wrote:
Using $ in flash is just wierd :). There is no special meaning - I
don't think it should even be valid.
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Fumio Nonaka
mailto:[EMAIL PROTECTED]
http://www.FumioNonaka.com/
My books<http://www.FumioNonaka.com/Books/index.html>
Flash community<http://F-site.org/>

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