body {
margin-top: 0px;
margin-right: 0px;
margin-bottom: 0px;
margin-left: 0px;
}
#wrapper {
height: 600px;
width: 900px;
border: 3px solid #CCCCCC;
background-color: #FFFFFF;
left: 50%;
top: 50%;
right: 50%;
bottom: 50%;
vertical-align: middle;
position: absolute;
margin-top: -300px;
margin-right: -450px;
margin-bottom: -300px;
margin-left: -450px;

}