function aownen_shift_email(mail_source) {
    var mail_dest = '';

    for(t = 0; t < mail_source.length; t++) {
        char_value = mail_source.charCodeAt(t);
        char_value -= 3;
        mail_dest += String.fromCharCode(char_value);
    }
    window.location.href = "mailto:" + mail_dest;
}