//验证码
define('CAPTCHA_REGISTER',      1);//注册时使用验证码
define('CAPTCHA_LOGIN',         2);//登录时使用验证码
define('CAPTCHA_COMMENT',       4);//评论时使用验证码
define('CAPTCHA_ADMIN',         8);//后台登录时使用验证码
define('CAPTCHA_LOGIN_FAIL',    16);//登录失败后显示验证码
define('CAPTCHA_MESSAGE',       32);//留言时使用验证码


$captcha = intval($_CFG['captcha']);
$captcha_check = array();

if($captcha & CAPTCHA_REGISTER) $captcha_check['register']='checked="checked"';
if($captcha & CAPTCHA_LOGIN)    $captcha_check['login']='checked="checked"';
if($captcha & CAPTCHA_COMMENT)  $captcha_check['comment']='checked="checked"';
if($captcha & CAPTCHA_ADMIN)    $captcha_check['admin']='checked="checked"';
if($captcha & CAPTCHA_MESSAGE)  $captcha_check['message']='checked="checked"';
if($captcha & CAPTCHA_LOGIN_FAIL){
  $captcha_check['login_fail_yes']='checked="checked"';
}else{
  $captcha_check['login_fail_no']='checked="checked"';
}