<script language="javascript">
function ShowImage()
{
if(BigImage.style.display=="none")
{BigImage.style.display="";}
else
{BigImage.style.display="none";}
}
</script>

<style type="text/css">
<!--
#BigImage {
 position:absolute;
 left:375px;
 top:28px;
 width:286px;
 height:136px;
 z-index:1;
}
-->
</style>
<img src="Image1.jpg" width="100" height="80" onMouseOver="ShowImage()" onMouseOut="ShowImage()">
<div id="BigImage" style="display:none"><img src="Image2.jpg" width="250"></div>