Hjælp med drop down menu

Kode 

body {
	background-image: url("images/a1.png");
	font-family: arial, myriad pro, verdana, microsoft sans serif;
	margin: 0;
}

#banner {
	margin-bottom: -5px;
}

#menu {
	z-index: 2;
}
dd {
position:absolute;
width: 10em;
margin: 0;
padding: 0;
list-style-type: none;
	z-index: 2;
}
dt, ul, li {
position:absolute;
margin: 0;
padding: 0;
list-style-type: none;
	z-index: 2;
}

dl {
position:relative;
margin: 0;
padding: 0;
list-style-type: none;
	z-index: 2;
width: 10em;
}
#menu dl {
float: left;
width: 10em;
color: #cccccc;
	z-index: 2;
}

#menu dt {
cursor: pointer;
text-align: center;
font-weight: bold;
background-image: url("images/a.png");
border: 1px solid gray;
margin: 1px;
	z-index: 2;
}
#menu dd {
display: none;
border: 1px solid gray;
	z-index: 2;
}
#menu li {
text-align: center;
background-color: #333366;
	z-index: 2;
}
#menu li a, #menu dt a {
color: #cccccc;
text-decoration: none;
display: block;
height: 100%;
border: 0 none;
	z-index: 2;
}
#menu li a:hover, #menu li a:focus, #menu dt a:focus {
background-image: url("images/ah.png");
color: #ffffff;
	z-index: 2;
}
#site {
position: absolute;
z-index: 1;
top : 70px;
left : 10px;
color: #000000;
background-color: #ddd;
padding: 4px;
border: 1px solid gray; 
	z-index: 2;
}

.small {
	font-size: 10px;
}

#wrapper {
	background-image: url("images/bg-i-t.png");
	margin: 0 auto;
	width: 800px;
}

.tekst {
	margin-left: 5px;
	margin-right: 5px;
	z-index: 1;
}