.centered-box {
	width: 400px;
	height: 200px;
	left: 50%;
	top: 50%;
	margin-top: -150px;
	margin-left: -200px;
	position: fixed;
font-size: 13px;
font-family: Arial;
text-align:center;
}

* html .centered-box { 
	position:absolute;
}