html, body{height:100%;} 
/* end hack */
body {
margin:0;
padding:0;
text-align:center;/* centre for ie5 and 5.5. */
min-height:72px;/*for mozilla/opera */
min-width:780px;/* """ */
background-color:#000;
}
img {
position: absolute;
left:0;
top: 50%;
margin-top: -100px; /* make this half your image/element height */
}
div.centre {
	height:100%;
	width:780px;
margin-left:auto;/* centre for compliant browsers */
margin-right:auto;/* centre for compliant browsers */
position:relative;/* gain stacking context for absolutely placed element */
}