body {
  margin:0px;
  top:0px;
  left:0px;
}

#contenido {
	position: relative;
	width:750px;
	margin:auto;
	top:0px;
}

#presentacion {
	position: absolute;
	width:750px;
	height:450px;
	margin:0px;
	top:30px;
	background-image:url(images/principal.jpg);
}

#barra_supeior {
	position: relative;
	width:750px;
	height:30px;
	margin:auto;
	top:0px;
	background-image:url(images/f_barra.gif);
}

#escudo {
	position:absolute;
	width:200px;
	height:30px;
	margin:auto;
	top:0px;
	left:0px;
}

#botones {
	position:absolute;
	width:550px;
	height:30px;
	top:0px;
	left:200px;
	text-align:right;
	margin:auto;
}

#pie {
	position: absolute;
	width:750px;
	height:20px;
	margin:auto;
	top:480px;
	background-image:url(images/f_pie.gif);
	font-family:Arial Narrow, Verdana, Arial, Helvetica, sans-serif;
	font-size:14px;
	text-align:center;
	color:#666666;
}

img{
	border:none;
	}