DedeCms 5.7后台怎么去除版权及去除广告

<?php
exit;
} else if ($dopost==&#39;showauth&#39;)
{
include(&#39;templets/index_body_showauth.htm&#39;);
exit;
} else if ($dopost==&#39;showad&#39;)
{
include(&#39;templets/index_body_showad.htm&#39;);
exit;
}
?>