document.getElementById('Submitter').onclick = handleSubmit;

function handleSubmit(e) {
    
    var NameValue = document.getElementById('NameInput').value;
    var EmailValue = document.getElementById('EmailInput').value;
    var ContentValue = document.getElementById('ContentInput').value;
    var EntryOK = true;

    if ((NameValue.length < 1) || (EmailValue.length  < 1) || (ContentValue.length < 1)) {
        EntryOK = false;
        alert('You must enter your name and email address, and the comment you wish to post.');
    }

    if (EntryOK) {
        ContentValue = ContentValue.replace(/\n/g,'--BR--');

        document.getElementById('NameInput').value = NameValue.replace(/[^a-zA-Z 0-9\.]+/g,'');
        document.getElementById('EmailInput').value = EmailValue.replace(/[^a-zA-Z 0-9\.@]+/g,'');
        document.getElementById('ContentInput').value = ContentValue.replace(/[^a-zA-Z 0-9\.,@\-]+/g,'');
    }

    return(EntryOK);
}