function changeSelect() {
        var boxQuest = document.getElementById("quest");
        var boxSelect = document.getElementById("ask");
        var selCountry = document.getElementById("country");
        var selIndex = selCountry.selectedIndex;
        if (selCountry.options[selIndex].value == 'RU' || selCountry.options[selIndex].value == 'BY' || selCountry.options[selIndex].value == 'KZ') {
        boxQuest.innerHTML = "Pour la Russie, la Biélorussie et le Kazakhstan nous pouvons nous charger d'obtenir l'invitation. Avez-vous besoin d'une invitation ?<span style='color:red;'>*</span>";
            boxSelect.innerHTML = "<input type='radio' name='needs_invitation' value='Y' />&nbsp;Oui&nbsp;&nbsp;&mdash;&nbsp;&nbsp; <input type='radio' name='needs_invitation' value='N' />&nbsp;Non";
        } else {
            boxQuest.innerHTML = " ";
            boxSelect.innerHTML = " ";
        }
    }