Tutorial für Header
#header_container {
position: absolute;
z-index: 3;
top: 4px;
left: 50%;
margin-left:-382px;
width: 726px;
height:98px;
background-color:transparency;
background-image:url(Header-URL);
color:#000000;
font-size:13px;
border: 1px solid #000000;}