.fondoCargando{
    position: absolute;
    width: 100%;
    height: 100%;
    left: 0px;
    top: 0px;
    z-index: 9000;
    opacity: 0.7;
    background-color: #999999;
}

.cargando {
    position: absolute;
    width: 100%;
    height: 100%;
    z-index: 10000;
    background-color: #FFF;
    text-align: center;
    opacity: 0.7;
}