U.Helper

<!-- Спойлер -->
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s=s.replace('[spoiler]','<div class="smallfont"><input type="button" style="color:#ff4040;" value="Офтоп" onclick="return spoiler_js(this);" class="codeButtons" title="Содержимое в спойлере" name="spoiler" /></div><div style="margin: 0px; padding:3px; display: none;">'); s=s.replace('[/spoiler]','</div>');  
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<!-- /Спойлер -->

<input type="button" accesskey="s" value="spoiler" onclick="simpletag('spoiler','','','message',''); return false;" class="codeButtons" title="Включить содержимое в спойлер" name="spoiler" />