var boton = document.getElementById('Suscripcion');
var formulario = document.getElementById('seccionFormulario');
boton.onclick = function(e) {
    e.preventDefault();
    if (formulario.style.display == "none") {
        formulario.style.display = "block";
        boton.innerHTML = "Cerrar";
    } 
    else {
        formulario.style.display = "none";
        boton.innerHTML = "Suscribirse";
    }
};