Cross Browser element centralization either vertical and hozirontal (also support ie 7) .

center.css

.vacA {display:table; height: 100%; width:100%; position: relative;}
.vacB {*position: absolute; top: 50%; display: table-cell; vertical-align: middle;}
.vacC {*position: relative; top: -50%;}

center.html

<div class="vacA"><div class="vacB"><div class="vacC">
	 <!-- blah blah -->
</div></div></div>