帝国CMS怎么禁止某用户组用户登录

//IP
$lastip=egetip();
$lastipport=egetipport();
$usql=$empire->query("update ".eReturnMemberTable()." set ".egetmf('rnd')."='$rnd',".egetmf('groupid')."='$r[groupid]' where ".egetmf('userid')."='$r[userid]'");
$empire->query("update {$dbtbpre}enewsmemberadd set lasttime='$lasttime',lastip='$lastip',loginnum=loginnum+1,lastipport='$lastipport' where userid='$r[userid]'");

if($r['groupid']==小黑屋用户组ID){
printerror("该账号涉嫌恶意使用已被禁止登录使用!","history.go(-1)",1,0,1);
}