/* commented backslash hack for ie5mac \*/ 
html, body{height:100%;} 
/* end hack */
body {
	margin:0;
	padding:0;
	text-align:center;/* centre for ie5 and 5.5. */
	min-height:480px;/*for mozilla/opera */
	min-width:640px;/* """ */
}
img {
	position: absolute;
	left:0;
	top: 50%;
	margin-top: 20%; /* make this half your image/element height */
}
div#center {
	height:100%;
	width:600px;
	margin-left:auto;/* centre for compliant browsers */
	margin-right:auto;/* centre for compliant browsers */
	position:relative;/* gain stacking context for absolutely placed element */
}