Frage bezüglich Navigation

<div id="Dein_Design"></div> <style type="text/css"> <!--
/* designed by www.alpadogg.de.tl*/

div.header {display: none;}
#extraDiv1 {display: none;}
#extraDiv2 {display: none;}
#extraDiv3 {display: none;}
#extraDiv4 {display: none;}
#extraDiv5 {display: none;}
#extraDiv6 {display: none;}
#pre_header {display: none;}
#post_header {display: none;}
#header_container {display: none;}
#pre_content {display: none;}
#nav_heading{display: none;}
div.header{display: none;}
h1#title{display: none;}
h2#title span {display: none;}

body {
background-image:url(http://i26.tinypic.com/dmtxdl.png);
font-family: arial,verdana;
font-size:12px;
color:#000000;}

div{
font-family: arial,verdana;
font-size:12px;
color:#000000;} content farbe

a{
color:#000000;
font-size: 25px;
text-decoration: none;}

a:hover {
color:#000080;
font-size: 25px;
text-decoration: none;}

a:link {
color: #000080;
font-size: 12px;
text-decoration: none;}

a:active {
color:#000080;
font-size: 12px;
text-decoration: none;}

a:visited {
color:#000080;
font-size: 15px;
text-decoration: none;}

#Dein_Design {
position: absolute;
left: 50%;
margin-left:-648px;
width: 1280px;
height: 1024px;
background-image:url(http://i43.tinypic.com/wa0u4o.png);
background-repeat: no-repeat;}

#content{
position: absolute;
left: 50%;
top: 300px;
margin-left:-355px;
width: 716px;
height: 611px;
color: #000000;
background-image:url();
background-repeat: no-repeat;
border: 0px solid #000000;
overflow: auto;}

#sidebar_container {display: none;}

#nav_container {font-weight: bold;font-size: 12px;color:#2ba6f9;
position:relative;
left: 50%;
top: 300px;
margin-left: -450px;
width:90px;
height:170px;}

#nav_container {
position:relative;
top: 205px;
left: 275px;
width: 718px;
margin:0px 10px 15px 10px;
background-image: url();
height: 35px;}

#nav_heading {
background-color: ;
width:2px;
height:33px;
display:inline;
float:left;
margin:0px;}

ul#nav {
width:100%;
list-style-type:none;
margin: 0;
padding: 8px 0 0 0;
position:absolute;
top: 0px;
height:35px;
background-image: url();
background-position:right;
background-repeat:no-repeat;
display:inline;}

* html ul#nav {
top: -1px;}

#nav li {
position:relative;
display: block;
float: left;
height: 35px;
background-image: url();
background-repeat: no-repeat;
margin: -8px 0 0 0;
padding: 8px 0 0 0;}

* html #nav li {
margin-top: -7px;
padding-top: 7px;
}
#nav_Startseite {
background-image: none !important;
margin-left:-5px;
}
#nav a:link, #nav a:visited, #nav a:hover {
font-family:Arial, Helvetica, Verdana, sans-serif;
font-size:11px;
font-weight:bold;
text-decoration:none;
color:white;
margin:0 8px;
z-index:2;
}
* html #nav a:link, * html #nav a:visited, * html #nav a:hover {
position:relative;
top: 1px;
}
#nav a:hover {
color:#ffcc00;
}

a{
color:#000000;
text-decoration: none;
font-size:13px;}

a:hover {
color: #ffffff !important;
font-size: 13px;
text-decoration: underline;}

a:link {
color: #xxxxxx !important;
font-size: 13px;
text-decoration: none;}

a:active {
color: #ffffff;
font-size: 13px;
text-decoration: none;}

a:visited {
color: #4A9AF6;
font-size: 13px;
text-decoration: none;}


#counter {display: none;}

li.nav_element{
list-style-type: none;
position: relative;
border: 0px;
width: 89,5px;
height: 31px;
text-align: center;}

li.nav_element a{
display: block;
width: 89,5px;
height: 31px;
margin: 0px;
color: #000000;
font-weight: bold;
text-decoration: none;
background-color: #xxxxxx;
background-image: url();
background-repeat: no-repeat;
padding-left: 0px;
border: 1px solid #xxxxxx;}

li.nav_element a:hover{
display: block;
color: black;
font-weight: bold;
text-decoration: none;
background-color:#xxxxxx;
background-image: url();
background-repeat: no-repeat;
border: 1px solid #xxxxxx;}
//--> </style>