function chkMail() {
    if (document.eform.m_name.value=="") {
        alert(errorNoName);
        document.eform.m_name.focus();
        return false;
        
    } else if (document.eform.m_email.value=="") {
        alert(errorNoEmail);
        document.eform.m_email.focus();
        return false;

    } else if (document.eform.m_subject.value=="") {
        alert(errorNoSubject);
        document.eform.m_subject.focus();
        return false;

    } else if (document.eform.m_text.value=="") {
        alert(errorNoText);
        document.eform.m_text.focus();
        return false;        
        
    } else {
       return true;
    }
}