words = ["[color=red][b][censored][/b][/color]","[color=red][b][censored][/b][/color]","уёбок","[color=red][b][censored][/b][/color]","хуй","[color=red][b][censored][/b][/color]","пизда"];

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    $("textarea[id='message']").keyup(function() {   
    error = "в тексте используется ненормативная лексика";   
    words = ["[color=red][b][censored][/b][/color]","[color=red][b][censored][/b][/color]","уёбок","[color=red][b][censored][/b][/color]","хуй","[color=red][b][CENSORED][/b][/color]","пизда"];   
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<div id="er"></div>$bbcodes$ $_message$

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<div id="er"></div>   
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  <tr id="frm28"><td class="gtableleft" id="frm29">описание темы:</td><td class="gtableright" id="frm30">$_thread_descr$</td></tr>