.andbg1 {
	background-attachment: fixed;
	background-image: url(../images/fondo_diseno1.jpg);
	background-repeat: no-repeat;
}
.andbg2 {

	background-attachment: fixed;
	background-image: url(../images/fondo_diseno2.jpg);
	background-repeat: no-repeat;
}
.andbg3dcontact {


	background-attachment: fixed;
	background-image: url(../images/fondo_contactos.jpg);
	background-repeat: no-repeat;
}