x
 
<html>
<head>
<script type="text/javascript">
function cursor(event)
{
document.getElementById('trail').style.visibility="visible"
document.getElementById('trail').style.position="absolute"
document.getElementById('trail').style.left=event.clientX+10
document.getElementById('trail').style.top=event.clientY
}
</script>
</head>
<body onmousemove="cursor(event)">
<h1>请在页面上移动指针</h1>
<span id="trail" style="visibility:hidden">指针文本</span>
</body>
</html>