body{
	background:url(grua.jpeg);
}
#menu {
	text-align: center;
	width: 950 px;
	height: 50px;
	margin: auto;
	padding: 0;
	background: url(menu.jpeg) left top;
	margin:0 auto;
}
#menu ul {
	list-style-type: none;
	margin: 0;
	padding: 0;
}
#menu ul li {
}
#menu ul li.nivel1 { 
	float: left;
	margin-right: 1px;

}
#menu ul li a {
	height:33px;
	display: block;
	float: left;
	padding: 16px 16px 0 16px;
	font: bold 12px Arial;
	color:white;
	text-decoration: none;
	background-image: url(navigation-separator.png) no-repeat right center;
}
#menu ul li a.nivel2 {
	color:blue;
}
#menu ul li a.nivel1, #menu ul li a.nivel2 {
	display: block;
	position: relative;

}
#menu ul li:hover {
	position: relative;

}
#menu ul li a:hover, #menu ul li:hover a.nivel1 {
	color: white;
	background: url(menu.jpeg) left top;
}
#menu ul li ul {
	display: none;
}
#menu ul li:hover  ul.nivel2, #menu ul li a:hover  ul.nivel2{
	display: block;
	position: absolute;
	left: 0px;
	top: 50px;
}

#menu ul li ul li a:hover ul.nivel3, #menu ul li ul li:hover ul.nivel3 {
	display: block;
	position: absolute;
	left: 100px;
	top: auto;
}
#menu ul li ul li a {
	width: 140px;
	padding: 8px 0px;
	border-top-color: transparent;
	color:blue;
}
#menu ul li ul li a:hover {
	border-top-color: #000;
	position: relative;
}
#menu ul li ul li ul li ul.nivel3 {
	border-top-color: #fff;
}
.formulario {
	width:350px;
	min-height:170px;
	margin:auto;
	position:relative;
	top:200px;
	background-image:url(menu.jpeg);
	color: white;	
	padding:20px;
	}
.usuario {
	padding:10px;
	color:white;
	
	}