.td_boton {
	background: Silver;
	border-right: 2px solid #5A5A5A;
	border-bottom: 1px solid #4B4B4B;
	border-left: 2px solid White;
	border-top: 1px solid White;
}
.td_undido {
	background: Silver;
	border-right: 1px solid White;
	border-bottom: 1px solid White;
	border-left: 1px solid #5A5A5A;
	border-top: 1px solid #4B4B4B;
}