.fundosombra {
	background-attachment: fixed;
	background-image: url(images/fundo-sombra.gif);
	background-repeat: repeat-y;
	background-position: left top;
}
.fundoloading {
	background-attachment: fixed;
	background-image: url(images/loadingAnimation.gif);
	background-repeat: no-repeat;
	background-position: center center;
}
.fundotopo {
	background-image: url(images/pixel-azul.gif);
	background-repeat: repeat;
}