.sfsx {
	background-image: url(immagini/index_r1_c1.jpg);
	background-repeat: no-repeat;
	background-position: right top;
}
.sfdx {
	background-image: url(immagini/index_r1_c18.jpg);
	background-repeat: no-repeat;
	background-position: left top;
}
.sfdxb {
	background-image: url(immagini/st2_r1_c13.jpg);
	background-repeat: no-repeat;
	background-position: left top;
}