*{margin:0; padding:0;}

#menu_principal{ /* Será o nome de minha div menu */
	clear:both;
	font-size:11px;
	}
	
ul {
	list-style-type:none;
	}
	
ul#menu {
	z-index:100;
	width:980px;
	margin:0 auto;
	border-top:3px solid #2a4858;
	}
	
ul#menu li{
	z-index:100;
	position:relative;
	float:left;
	}
	
ul#menu li a{
	display: block;
	float:left;
	padding:0 12px;
	height:30px;
	line-height:25px;
	background:#4e97c2;
	font-family:"Trebuchet MS", Arial, Helvetica, sans-serif;
	color:#FFF;
	text-decoration:none;
	}
	
ul#menu li a:hover {
	background:#2a4858;
	font-size:11px;
	}
	
ul#menu li ul {
	display:none;
	position:absolute;
	top:30px;
	left:0;
	}
	
ul#menu li:hover ul{
	display:block;
	}
	
ul#menu li ul a {
	width:100px;
	border-bottom:1px solid #FFF;
	border-top:0px;
	}