body { position:relative; }
#pop {
    top:30px;
    width:750px;
    margin-left:-350px;
    left:50%;
    display:none;
    position:absolute;
}
#popstyle {
    background-color:#fff;
    border:5px solid #79b;
    padding:10px 15px;
/*    text-align:center;*/
}
#popdim {
    background-color:#3c4043;
    opacity: 0.8;
    filter:alpha(opacity=80);

    position:absolute;
    left:0;
    top:0;
    width:100%;
    height:100%;
    display:none;
}