#itemPreview 
{
    width:820px;
    background:#fff url(/images/301.gif) no-repeat center center;
    position:absolute;
    left:50%;
    top:100px;
    margin-left:-400px;
    z-index:2001;
}

#itemPreview iframe 
{
    width:820px;
    height:600px;
    overflow-x: hidden; 
    overflow-y: scroll;
}