Pop-up box: 2

.popup_block{
    display:none;
    background:#fff;
    padding:20px;
    border:1px solid #eee;  /* if you want a solid white pop-up, delete this */
    float:left;
    position:fixed;
    top:50%;left:50%;
    z-index: 99999;
    -webkit-box-shadow: 0px 0px 20px #000; /* delete for solid white */
    -moz-box-shadow: 0px 0px 20px #000; /* delete for solid white */
    box-shadow: 0px 0px 20px #000; /* delete for solid white */
}

*html #fade {position: absolute;}
*html .popup_block {position: absolute;}
#fade {
    display:none;
    position:fixed;
    left:0px;
    top:0px;
    width:100%;
    height:100%;
    z-index:9999;
    background:#000; /* change to #fff for solid white */
    opacity:0.5; /* change to opacity:1; */
}