.riganera1px {
	background-color: #000000;
	background-image: url(nn4img/black.gif);
	background-repeat: repeat
}
.riganera2px {
	background-color: #000000;
	background-image: url(nn4img/black2px.gif);
	background-repeat: repeat
}
.ombradx {
	background-image : url(nn4img/riga_dx.gif);
}
.ombrasub {
	background-image : url(nn4img/riga_sub.gif);
}