html, body, div, iframe {
	margin:0;
	padding:0;
	height:100%;
}
#contenido {
	width: 870px;
	padding: 0px;
	margin-top: 0px;
	margin-right: auto;
	margin-bottom: 0px;
	margin-left: auto;
}
#contenido #barra {
	color: #CCC;
	height: 26px;
	width: 853px;
	position: absolute;
	background-image: url(imagenes/barrasup_x.png);
	background-position: 0px top;
	background-repeat: repeat-x;
	z-index: 10;
}
iframe {
	display:block;
	width:100%;
	border:none;
}