.topo {
	background-image: url(imgs/topo.jpg);
	background-repeat: no-repeat;
}
.topoprin {
	background-image: url(imgs/topoprin.jpg);
	background-repeat: no-repeat;
}
.meioprin {
	background-image: url(imgs/meioprin.jpg);
}
.rodapeprin {
	background-image: url(imgs/baixoprin.jpg);
	background-repeat: no-repeat;
}