
<div class="header"></div>






.header {width: 800px; 
height: 490px; 
position: absolute; 
margin-left: -401px; 
left: 50%;
top:0px; 
bottom: 0px; 
background-image: url('http://i4.photobucket.com/albums/y117/southsidesk8er1/header-1.gif'); background-position:top center; 
background-repeat:no-repeat;
border:solid;
border-color:000000;
border-size:1px;
}