#ad { 
background:#FFF;
text-align:center;
margin: 0 auto;
border:2px solid #000; 
color:#000; 
position:absolute; 
top:20px;
left: 500px;
width:430px; 
visibility:hidden;  
z-index:1 
}
.zycz_p
{
 padding: 0 0 0 0;
 margin: 0 0 0 0;
 border:10px solid #FFF;
 font-family:Georgia;
 font-weight:bold;
 font-size:14px;
}