body{
    background-color: #c0c0f0;
    text-align: center;
    margin-top: 0;
    font-family: verdana, arial, helvetica;
}
#contenedor{
    background-color: #ffffff;
    text-align: left; width: 900px;
    margin: auto; /* Con esto centra esta capa en IE y Firefox */
    border-style: solid;
    border-width: 2px;
}
.imagen_brujula{
    position: relative; 
    left: 80px;
    top: 70px;
}
.imagen_servicio{
    position: relative;
    left: 95px;
    top: -150px;
}
.imagen_actividades{
    position: relative;
    left: 55px;
    top: -150px;
}
.imagen_centro{
    position: relative;
    left: 60px;
    top: -95px;
}
.imagen_noticias{
    position: relative;
    left: 420px;
    top: -95px;
}
.imagen_voluntariado{
    position: relative;
    left: 120px;
    top: -50px;
}
.imagen_contactar{
    position: relative;
    left: 390px;
    top: -50px;
}
.imagen_galeria{
    position: relative;
    left: -40px;
    top: 0px;
}
.imagen_inicio{
    position: relative;
    left: 35px;
    top: 30px;
}