ById("mongo_validity").innerHTML = "Invalide";
                    document.getElementById("mongo_validity").style.color = "red";
                    document.getElementById("coll_stats").innerHTML = "";
                } else {
                    document.getElementById("mongo_validity").innerHTML = "Erreur";
                    document.getElementById("mongo_validity").style.color = "red";
                    document.getElementById("coll_stats").innerHTML = "";
                }
            }

         