#cabecera{
    font-family:Arial, Helvetica, sans-serif;
    font-style: oblique;
    font-size:x-large;
    text-align:center;
    color: white;
}
#indice{
   
    font-family: Verdana, sans-serif, Arial, Helvetica, sans-serif;
    font-size:large;
}
#contenido{
    font-family:Verdana, Arial, Helvetica, sans-serif;
}
#piedepagina{
    font-weight:bold;
    text-align:center;
}