#pop {    z-index:2;    position:absolute;    border: 1px solid #333333;    text-align:center;    background:#000000; } 
#cerrar {    float:right;    margin-right:5px;    cursor:pointer;    font:bold 12px Verdana, Arial, Helvetica, sans-serif;    color:#FF0000;    background-color:#666666;    width:12px;    position:relative;    margin-top:-1px;    text-align:center; }