<style type="text/css">
* {margin:0;padding:0}
div {
width:500px;
height:500px;
border:1px solid #c00;
overflow:hidden;
position:relative;
display:table-cell;
text-align:center;
vertical-align:middle
}
div p {
position:static;
+position:absolute;
top:50%
}
img {
position:static;
+position:relative;
top:-50%;left:-50%;
}
</style>
<div>
<p><a href="http://www.jq-school.com/" target="_blank"><img src="http://www.jq-school.com/images/logo.gif" width="358" height="96" /></a></p>
</div>