The CSS Display Property Pop-up Method
Test this pop-up method: Using the CSS Display Property Pop-up Method
THE CODE
<html>
<head><title>The CSS Display Property Pop-up Method</title>
<script type="text/javascript">
function show(l){e=document.getElementById('o');e.style.display=l;}
</script>
</head>
<body>
<IMG SRC="doorknob.gif" WIDTH=50 HEIGHT=50 BORDER=0 onMouseOver="javascript:show('block');return true" onMouseOut="javascript:show('none');return true">
<div id="o" style="position:absolute; left:200px; top:100px; width:400px; height:400px;display:none"><IMG SRC="doorknob-big.gif" WIDTH=400 HEIGHT=400 BORDER=0></div>
</body>
</html>