zhangjingyu 
if ($rg_config['rg_emailtype'] == 1 && $rg_config['rg_email']) {
$e_check = 0;
$e_limit = explode(',', $rg_config['rg_email']);
foreach ($e_limit as $key => $val) {
if (strpos($email,"@".$val) !== false) {
$e_check = 1;
break;
}
}
if ($e_check == 0){
Showmsg('电子邮箱不是系统指定的邮箱地址，不能注册!');
}
}