function VerifLogin(login) {
    var xhr=null;
    var fichier = "newsletter.php?verifLogin="+escape(login);
    if (window.XMLHttpRequest) { 
        xhr = new XMLHttpRequest();
    }
    else if (window.ActiveXObject) 
    {
        xhr = new ActiveXObject("Microsoft.XMLHTTP");
    }
    
    xhr.open("GET", fichier, false);
    xhr.send(null);
    // alert(xhr.responseText);
    return(xhr.responseText);
}

function VerifEmail(email) {
    var xhr=null;
    var fichier = "newsletter.php?verifEmail="+escape(email);
    if (window.XMLHttpRequest) { 
        xhr = new XMLHttpRequest();
    }
    else if (window.ActiveXObject) 
    {
        xhr = new ActiveXObject("Microsoft.XMLHTTP");
    }
    
    xhr.open("GET", fichier, false);
    xhr.send(null);
    // alert(xhr.responseText);
    return(xhr.responseText);
}