body { font: normal 70.5% verdana; }

ul.menubar
{
   margin: 0px;
   padding: 0px;
   background-color: #FFFF00; /* IE6 Bug */
   font-size: 100%;
   }

ul {
	margin: 0px;
	padding: 0px;
	list-style: none;
	width: 170pxx;
	background: #4e7fd9;
	}
	
ul li {
	position: relative;
	}

li ul {
	position: absolute;
	left: 170px;
	top: 0;
	display: none;
	}

ul li a {
	display: block;
	text-decoration: none;
	color: #fcff00;
	background: #4e7fd9;
	padding: 5px;
	border: 1px solid #ccc;
	border-bottom: 0;
	}
/* Fix IE. Hide from IE Mac \*/
* html ul li { float: left; }
* html ul li a { height: 1%; }
/* End */

ul {
	margin: 0;
	padding: 0;
	list-style: none;
	width: 170px;
	border-bottom: 0px solid #ccc;
	}

li:hover ul { display: block; }
li:hover ul, li.over ul { 
	display: block; }
	<ul id="nav">
/* Fix IE. Hide from IE Mac \*/
* html ul li { float: left; height: 1%; }
* html ul li a { height: 1%; }
/* End */
li:hover ul ul, li.over ul ul { 
display:none; 
}

li:hover ul, li li:hover ul, li.over ul, 
li li.over ul { 
display: block; 
} /* Aqui a magica */
li:hover ul, li.over ul { 
display: block; 
}

a:link, a:visited, a:active {
text-decoration: none;
 background:#;
 color: #; font-weight: bold; 
}
a:hover {text-decoration: none; 
 color:#fcff00; 
background:#000000;
}