function subscription(lang) {
    var semail = document.frm_newsletter.inf_email.value;
    var at     = '@';
    var dot    = '.';

    if (semail == '' || semail.indexOf(at) == -1 || semail.indexOf(dot) == -1 || semail.indexOf(" ") != -1 || semail.length < 8) {
        if (lang == 'fr') {
            alert('Veuillez entrer une adresse courriel valide...        ');
        } else {
            alert('Please enter a valid email address...        ');
        }
        document.frm_newsletter.inf_email.focus();
    } else {
        document.frm_newsletter.submit();
    }
}