.fons_sup {
	background-attachment: scroll;
	background-repeat: repeat;
	background-position: right bottom;
}
.fons_esq {
	background-attachment: scroll;
	background-repeat: no-repeat;
	background-position: right top;
}
.fons_dreta {
	background-repeat: no-repeat;
	background-position: left top;
}