#pop {    z-index:1000;
position:absolute;
border: 1px solid #333333;
text-align:center;
background:#000000;
}

#cerrar {    
float:right;
margin-right:5px;
cursor:pointer;
font:Verdana, Arial, Helvetica, sans-serif;
font-size:12px; 
font-weight:bold; 
color:#FFFFFF;
background-color:#666666;
width:12px;
position:relative;
margin-top:-1px;
text-align:center;
}