public function testReplaceGreekingText()
 {
     mb_internal_encoding("UTF-8");
     $mailform = new MailForm();
     $this->assertEquals('(株)', $mailform->replaceGreekingText('㈱'));
     mb_internal_encoding("UTF-7");
     $this->assertEquals('㈱', $mailform->replaceGreekingText('㈱'));
 }