function showLayer(layerId) {
    window.document.getElementById('pg_insertar').style.display = layerId=='pg_insertar'?'':'none';
    window.document.getElementById('pg_contactar').style.display = layerId=='pg_contactar'?'':'none';
    window.document.getElementById('pg_modificar').style.display = layerId=='pg_modificar'?'':'none';
}

function showSelectedLayer() {
    if (window.document.getElementById('si_en_cambio_deseas_insertar').checked) showLayer('pg_insertar');
    else if (window.document.getElementById('si_en_cambio_deseas_contactar').checked) showLayer('pg_contactar');
    else if (window.document.getElementById('si_en_cambio_deseas_modificar').checked) showLayer('pg_modificar');
}