div.cluster {
text-align:center;
}
#layer1 {
position: absolute;
visibility: hidden;
width: 100%;
height:100%;
text-align:center;
margin:0px;
left:0px;
}
#middle {
background-color: #ffffff;
border: 1px solid #000;
width:770px;
padding:10px;
z-index: 1;
margin:auto;
margin-top:50px;
}
div#popUp {
position: absolute;
visibility:hidden;
width: 100%;
height: 100%;
filter:alpha(opacity=50);
-moz-opacity:0.5;
opacity: 0.5;
background-color: #444;
margin:0px;
left:0px;
}
.close {
padding-right:5px;
padding-top:5px;
float: right;
}

div.content {
margin:auto;
padding-top:50px;
}