body {
	background-attachment: fixed;
	background-image: url(../img/home_new.jpg);
	background-repeat: repeat;
	background-position: center center;
	background-color: #000000;
	margin: 0px;
}
#entrada {
	width: 352px;
	height: 264px;
	margin-top: -132px;
	margin-left: -176px;
	position: absolute;
	left: 50%;
	top: 50%;
}
#contenido {
	height: 500px;
	width: 760px;
	margin-top: -250px;
	margin-left: -380px;
	position: absolute;
	left: 50%;
	top: 50%;
}
#construccion {
	height: 264px;
	width: 194px;
	margin-top: -132px;
	margin-left: -97px;
	position: absolute;
	left: 50%;
	top: 50%;
}