sto provando in tutti i modi ma non mi funziona... provo a postarti il codice quasi sicuramente è lì il problema

codice:


body{
	width:960px;
	color:#666;
	font-family:Verdana, Geneva, sana-serif;
	font-size:12px;
	margin: 0 auto;
	background-color: lightblue;

}

* {
margin:0;

padding:0;

}


#containter {
	width:960px;
	margin:0 auto 0 auto;
	background-color: white;

}


#header {

	width:960px;
	height:230px;
	background-color:#5893D3;
	position: relative;


}


#nav {
	
	width:940px;
	background-color:#1452C5;
	height: 30px;
	padding: 10px;
	float: left;
	

}

#nav ul li {
	float:left;
	margin-right:10px;
	font-family: georgia;
	font-size: 18px;
	text-align:center;
	width:130px;
	height:40px;
	list-style-type:none;

	
}

#nav a:link, #nav a:visited {

	color:#fff;
	text-decoration:none;

	
}

#nav a:hover {

	color:#5893D3;
	text-decoration:none;
	
}

ul#menu li {

	float:left;
	margin-right:5px;
	z-index:1000;

}

ul#menu li a {

	display:block; 
	color:#333; 
	background:#ccc; 
	text-decoration:nome;
	padding: 5px 20px;
	z-index:1000;

}


ul#menu a:hover {

	
	color:#fff; 
	background:#f00;

	
	
}

ul#menu li ul {

	display:none;
	z-index:100;
}

ul#menu li:hover ul {

	display:block;
z-index:1000;
	
}

ul#menu li ul li {

	float:none;
	
}

ul#menu li ul li a{

	padding-left:30px;

}

#right	{
	
	float: right;
	width:750px;
	height: 520px;
	padding: 20px 20px 20px 20px;
	background-color: white;
	
	z-index:-1;
	
}

#left {

	float:left;
	width:150px;
	padding: 10px;
	height: 540px;
	background-color:white;
	z-index:-1;

}

#footer {
	background-color:#000;
	color:#fff;
	border-top:5px solid #5693D3;
	text-align: center;
	padding:10px 0;
	width: 960px;
	clear:both;

	
}

h1, h2, h3 {

	font-family: Georgia, "Times New Roman", Times, serif;
	margin-bottom:10px;
	color:#5893D3;
	font-weight: nomal;
	font-size:24px;
}