a.screen2, a.screen2:visited {
color:#c00; 
position:relative; 
z-index:1;
}
a.screen2 b {
position:absolute;
visibility:hidden; /* hide the image */
width:380px; /* give it a width */
height:100%; /* no height to solve an Opera bug that makes it selectable when hidden */
border:0px solid #000; /* add a border */
top:0px;
left: -10px;
}
a.screen2:hover {
text-decoration:none; 
border:0; /* needed for this to work in IE */ 
z-index:1000;
}
a.screen2:hover b {
visibility:visible; /* make the image visible */
height:460px; /* now give it a height */
cursor:pointer; /* for IE */
z-index:500; 
}
a.screen2:hover b img {
border:0; /* remove the link border */
z-index: 500;
}