.tab-sup {
	background-image: url(img/cebor_r1_c2.jpg);
	background-repeat:   repeat-x;
}
.tab-izq {
	background-image: url(img/cebor_r2_c1.jpg);
	background-repeat:  repeat-y;
}
.tab-inf {
	background-image: url(img/cebor_r3_c2.jpg);
	background-repeat:  repeat-x;
}
.tab-der {
	background-image: url(img/cebor_r2_c3.jpg);
	background-repeat:  repeat-y;
}
.t-s {
	background-image: url(img/t_r1_c2.gif);
	background-repeat:  repeat-x;
}
.t-d {
	background-image: url(img/t_r2_c3.gif);
	background-repeat:  repeat-y;
}
.t-i {
	background-image: url(img/t_r3_c2.gif);
	background-repeat:  repeat-x;

}
.t-z {
	background-image: url(img/t_r2_c1.gif);
	background-repeat:  repeat-y;
}