<form method="post" action="/forum/">     
<input type="hidden" name="user" value="$USERNAME$">     
<input type="submit" value="перейти">     
<input type="hidden" name="a" value="6">
<input type="hidden" name="fid" value="27">     
<input type="hidden" name="o1" value="1">     
<input type="hidden" name="o2" value="0">     
</form>

<input type="hidden" name="user" value="$USERNAME$">

<input type="hidden" name="fid" value="27">