window.onload = function() {
    document.getElementById('Panier').innerHTML='';
    
    if (window.XMLHttpRequest)
    {
        xhr = new XMLHttpRequest();
    }
    else if (window.ActiveXObject)
    {
        xhr = new ActiveXObject("Microsoft.XMLHTTP");
    }

    xhr.onreadystatechange = function()
    {
        if (xhr.readyState == 4 && xhr.status  == 200)
        {
            var Reponse = xhr.responseText;
            if(Reponse!='undefined')
                document.getElementById('Panier').innerHTML   = '<span class="Noir">'+Reponse+'</span>';
        }
    };

    xhr.open('post', 'ajax_panier.php?id_rubrique='+document.getElementById('id_rubrique').value+'&produit='+document.getElementById('produit').value, true);
    xhr.setRequestHeader('Content-Type', 'application/x-www-form-urlencoded');
    xhr.send();
}