.caja {
	margin: 0in auto;
	color: #000000;
	padding: 10px;
	text-align: justify;
	border: 2px solid #000000;
	/* Do rounding (native in Firefox and Safari) */
    -webkit-border-radius: 10px;
	-moz-border-radius: 10px;
}
.cajafondo {
	margin: 0in auto;
	color: #000000;
	padding: 10px;
	text-align: justify;
	background-color: #FFFFFF;
	border: 2px solid #000000;
    background-image:url(../imagenes/fondo.gif);
    background-repeat: repeat-x;
	/* Do rounding (native in Firefox and Safari) */
    -webkit-border-radius: 10px;
	-moz-border-radius: 10px;
}
.nocaja {
	margin: 0in auto;
	color: #000000;
	text-align: justify;
	border:none;
}