/* <![CDATA[ */
body {
	font-size: 12px;
	font-family: arial, helvetica, sans-serif;
	background-color: #eee;
	margin: 0;
	padding: 0;
	height: auto;
}

#wrap{
	width:778px;
	height:auto;
}

#mydiv {
	position:absolute;
	top: 50%;
	left: 50%;
	width:700px;
	height:570px;
	margin-top: -285; /*set to a negative number 1/2 of your height*/
	margin-left: -350px; /*set to a negative number 1/2 of your width*/
	border: 1px solid #ccc;
	background-color: #f3f3f3;
}

 
/* ]]> */