BODY {
	background-image: url(../img/fondo.png);
	background-repeat: repeat-x;
	background-position: top;
}
.tablaprincipal {
	position: absolute;
	height: 100%;
	width: 100%;
	background-image: url(../img/fondo_esquina.jpg);
	background-repeat: no-repeat;
	background-position: left top;
}