일반 게시판

skin - default - header.html

<block cond="!$module_info->duration_new = (int)$module_info->duration_new">{@ $module_info->duration_new = 12 }</block>

dx 게시판 

skins - default - ___setting.html

$module_info->duration_new?0:$module_info->duration_new = '12';