.Izq {
	background-image: url(../servicios/Sellado/Imagenes/InGral_r11_c2.gif);
}
.center {
	background-image: url(../servicios/Sellado/Imagenes/InGral_r11_c12.gif);
}
.Der {
	background-image: url(../servicios/Sellado/Imagenes/InGral_r11_c16.gif);
}