#popBox {
position:fixed; 
z-index: 1000;
top:50px; 
left:33%;
visibility: hidden;
}

#popBox .headerbar{ 
position: absolute;
top: 5px;
right: 42px;
color: gray;
padding: 5px 0 0 0;
text-align: right;
margin-right: 20px;
}

#popBox .headerbar a{ /*CSS for header bar links of interstitial box*/
font-size: 120%;
text-decoration: none;
}