<style>
#leftright, #topdown{
position:absolute;
left:0;
top:0;
width:1px;
height:1px;
layer-background-color:#cccccc;
background-color:#cccccc;
z-index:100;
font-size:1px;
}
</style>
<script language="JavaScript">
<!--
function followmouse(){
leftright.style.pixelTop=event.clientY
topdown.style.pixelLeft=event.clientX
}
document.onmousemove=followmouse
//-->
</script>
<div id="leftright" style="width:expression(document.body.clientWidth)"></div>
<div id="topdown" style="height:expression(document.body.clientHeight)"></div>