#div_carga {
    position: fixed;
    top: 0;
    left: 0;
    width: 100%;
    height: 100%;
    background-color: white;
    opacity: 70%;
    display: none;
    z-index: 1;
}

#cargador {
    position: absolute;
    top: 50%;
    left: 50%;
    margin-top: auto;
    margin-left: auto;
}