CSS: Das Design verdeckt die Werbung?

#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;}
#pre_content {display: none;}
#nav_heading{display: none;}
div.header{display: none;}
h1#title{display: none;}
h2#title span {display: none;}

body {
background-color:#1100FF;}


*{ padding: 0; margin: 0; }



#Mein_Bild {
position:absolute;
top: 100px;
left:10px;
width: 1099px;
height:832px;
background-image:url(http://img.webme.com/pic/f/fonk/habbo_2_bild.gif);}

#content {
position:absolute;
left:280px;
top:290px;
width: 530px;
height: 550px;
background-color:#343434;
background-image:url(http://img.webme.com/pic/3/3xx/alkor-weiss.jpg);
border:px solid #6699FF;
color:;
overflow:auto;}




#sidebar_container{
position: absolute;
top:265px;
left:835px;
width: 167px;
height: 142px;
background-color:#343434;
background-image:url(http://img.webme.com/pic/3/3xx/alkor-weiss.jpg);
border:px solid #6699FF;
color:;
overflow:auto;}


#nav_container{
position: absolute;
top:275px;
left: 90px;
width: 200px;
height:400px;
font-family: arial, sans-serif;
}

ul#nav{
width: 2px;
padding: 5px;
margin: 0px;}

li.nav_element{
list-style-type: none;
position: relative;
padding:5px;
width: 134px;}

li.nav_element a{
display: block;
width: 142px;
padding:4px;
font-weight: arial;
text-decoration: arial;
text-align: left;
color:#000000;
background-color:#000000;
background-image:url(http://img.webme.com/pic/3/3xx/alkor-weiss.jpg);
}

li.nav_element a:hover{
color: #000000;
background-color:#C9C9C9;
background-image:url(http://img.webme.com/pic/3/3xx/alkor-weiss.jpg);}