function valid_newsletters(){
    
    var data = "";
    var xhr_object = null;
    var email = document.getElementById("EMAIL_NEWSLETTERS").value;
    var inputEmail = document.getElementById("EMAIL_NEWSLETTERS");
    var btOk = document.getElementById("IMG_OK_NEWSLETTERS").src;
    
    document.getElementById("IMG_OK_NEWSLETTERS").src = '/images/spinner_grey.gif';

    if( verifmail(email,inputEmail) ){
        xhr_object = InitializeXMLHttpRequest("POST", "/frontblocks/newsletters/add_newsletters.asp", false);
        data = "EMAIL_NEWSLETTERS=" + email + "&PASSAGE=2&AJAX_INSERT=1";
        xhr_object.send(data);
        if(xhr_object.readyState == 4){
            inputEmail.style.display = 'none';
            document.getElementById("IMG_OK_NEWSLETTERS").style.display = 'none';
            document.getElementById("TITRE_NEWSLETTERS").style.display = 'none';
            document.getElementById("INFO_NEWSLETTERS").style.display = 'none';
            document.getElementById("SPAN_CONFIRMATION_NEWSLETTERS").style.display = '';
        }
        else
            alert(UPDATE_ERROR);
    }
    else{
        alert(ALERT_BAD_EMAIL_FORMAT);
        document.getElementById("IMG_OK_NEWSLETTERS").src = btOk;
    }
}

function popUpML(){
    window.open('/includes/design/mailing_lists_popup.asp','popUpML','width=530,height=250,directories=no, location=no, menubar=no,scrollbars=no,status=yes,resizable=yes,left=67.19999999999993,top=26.25')//'width=100,height=100,scrollbars=yes,status=yes,resizable=yes');
}

function onFocusEmailField(field){
    if(field.value==EMAIL){ 
        field.value='';
    }
    field.style.fontStyle = 'normal';
    field.style.color = 'black';
}

function onBlurEmailField(field){
    if(field.value==''){
        field.value= EMAIL;
        field.style.fontStyle = 'italic';
        field.style.color = 'graytext';
    }
}