可以滚动，但是看不到滚动条。前提是你必须在页面载入的时候将鼠标焦点对准到A2层上，如果焦点在A2层外，滚轮和下建无效。这个可以用js很容易做到。
方案2：直接把滚动条颜色设置和背景层一样。
<html><head>
<meta http-equiv="Content-Type" content="text/htmlcharset=gb2312">
<title>跟随鼠标移动的十字架坐标</title>
<style>
<!--#leftright, #topdown{position:absolute
left:0top:0width:1pxheight:1pxlayer-background-color:red
background-color:redz-index:100font-size:1px}-->
</style>
<style>
<!--#leftright, #topdown{position:absoluteleft:0
top:0width:1pxheight:1pxlayer-background-color:red
background-color:redz-index:100font-size:1px}-->
</style>
</head>
<body>
<div id="leftright" style="width:expression(document.body.clientWidth-2)"></div><div
id="topdown" style="height:expression(document.body.clientHeight-2)"></div>
<script
language="JavaScript1.2">
<!--
if (document.all&&!window.print){
leftright.style.width=document.body.clientWidth-2
topdown.style.height=document.body.clientHeight-2
}
else if (document.layers){
document.leftright.clip.width=window.innerWidth
document.leftright.clip.height=1
document.topdown.clip.width=1
document.topdown.clip.height=window.innerHeight
}
function followmouse1(){
//move cross engine for IE 4+
leftright.style.pixelTop=document.body.scrollTop+event.clientY+1
topdown.style.pixelTop=document.body.scrollTop
if (event.clientX<document.body.clientWidth-2)
topdown.style.pixelLeft=document.body.scrollLeft+event.clientX+1
else
topdown.style.pixelLeft=document.body.clientWidth-2
}
function followmouse2(e){
//move cross engine for NS 4+
document.leftright.top=e.y+1
document.topdown.top=pageYOffset
document.topdown.left=e.x+1
}
if (document.all)
document.onmousemove=followmouse1
else if (document.layers){
window.captureEvents(Event.MOUSEMOVE)
window.onmousemove=followmouse2
}
function regenerate(){
window.location.reload()
}
function regenerate2(){
setTimeout("window.onresize=regenerate",400)
}
if ((document.all&&!window.print)||document.layers)
//if the user is using IE 4 or NS 4, both NOT IE 5+
window.onload=regenerate2
//-->
</script>
</body>
</html>
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