.zoom_visibile_mozz{

position:absolute; 
width:660px;
height:500px;
z-index:500;
left: 50%;
margin-left:-330;

visibility:visible





}
.zoom_visibile_exp{



position:absolute; 
width:660px;
height:500px;
z-index:500; 
left: 50%;
margin-left:-330;

display:inline



}