a.screen, a.screen:visited { color:red; font-size: 10pt; font-family: Arial; font-weight: bold; position:relative; z-index:1; }
a.screen b { position:absolute; visibility:hidden; /* hide the image */
border:ridge 1px #000; /* add a border */
left:250px; /* position:the image */
top:-250px; }
a.screen:hover {
text-decoration:none; 
border:0; /* needed for this to work in IE */ 
z-index:1000;
}
a.screen:hover b {
visibility:visible; /* make the image visible */
cursor:pointer; /* for IE */
z-index:500; 
}
a.screen:hover b img { 
 /* remove the link border */
}