a{
    color:black;
}

a.screen{
    text-decoration:none;
}

a.screen, a.screen:visited {
    color:#c00; 
    position:relative; 
    z-index:1;
}

a.screen b {
    position:absolute;
    visibility:hidden; /* hide the image */
    width:100%; /* give it a width */
    height:0; /* no height to solve an Opera bug that 
                 makes it selectable when hidden */
    border:0px solid #000; /* add a border */
    left:0; /* position:the image */
    top:0/*-150px*/;
    background:white;
}

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 */
    height:200px; /* now give it a height */
    cursor:wait/*pointer*/; /* for IE */
    z-index:500; 
}

a.screen:hover b img {
    border:0; /* remove the link border */
}