.caja {
		width: 482px;
		background-image: url("centro.gif");
		background-repeat: repeat-y;
	}
	
	.cajaarriba {
		background-image: url("arriba.gif");
		background-position: top center;
		background-repeat: no-repeat;
	}
	
	.cajaabajo {
		background-image: url("abajo.gif");
		background-position: bottom left;
		background-repeat: no-repeat;
		padding: 15px 15px 15px 15px;
	}