#capa_oscura{
	background:#000000;

	position:absolute;
	left: 0px;
	top: 0px;
	width:1040px;
	height:1800px;
	z-index:100px;
	
	opacity: 0.75;
	filter: alpha(opacity=75);
}

#capa_aviso {
	background:#FFFFFF;
	padding:20px;

	
	position:absolute;
	left: 0px;
	top: 0px;
	z-index:110px;
}