问题：当页面高度很大时，放大图片的图层不会跟随着
1.demo.html
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
<style type="text/css">
#ShowPictureBox { width:300px; height:300px;overflow:hidden; }
</style>
<script type="text/javascript" language="javascript" src="jquery.js"></script>
<script type="text/javascript" language="javascript" src="jquery.JNMagnifier.js"></script>
<script type="text/javascript">
var curPic = "";
$(document).ready(function () {
$(".pic").each(function () {
$(this).bind("mousemove",function () {
refresh(this);
});
});
});
function refresh(target) {
if (curPic != $(target).attr("id")) {
curPic = $(target).attr("id");
//$("#ShowBigPictureBox").html("");
$("#" + curPic).JNMagnifier({
renderTo: "#ShowBigPictureBox"
});
}
}
</script>
</head>
<body>
<div class="pic" id="AAA">
<img src="888.jpg" width="200" height="200">
</div>
<div class="pic" id="BBB">
<img src="777.jpg" width="200" height="200" />
</div>
<div id="ShowBigPictureBox" style=" position:absolute; top:20px; left:250px; overflow:hidden; display:none; border:3px solid #ccc; padding:5px; background-repeat:no-repeat; background-color:#fff; width:300px; height:300px;">
</div>
</body>
</html>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title></title>
<style type="text/css">
#ShowPictureBox { width:300px; height:300px;overflow:hidden; }
</style>
<script type="text/javascript" language="javascript" src="jquery.js"></script>
<script type="text/javascript" language="javascript" src="jquery.JNMagnifier.js"></script>
<script type="text/javascript">
var curPic = "";
$(document).ready(function () {
$(".pic").each(function () {
$(this).bind("mousemove",function () {
refresh(this);
});
});
});
function refresh(target) {
if (curPic != $(target).attr("id")) {
curPic = $(target).attr("id");
//$("#ShowBigPictureBox").html("");
$("#" + curPic).JNMagnifier({
renderTo: "#ShowBigPictureBox"
});
}
}
</script>
</head>
<body>
<div class="pic" id="AAA">
<img src="888.jpg" width="200" height="200">
</div>
<div class="pic" id="BBB">
<img src="777.jpg" width="200" height="200" />
</div>
<div id="ShowBigPictureBox" style=" position:absolute; top:20px; left:250px; overflow:hidden; display:none; border:3px solid #ccc; padding:5px; background-repeat:no-repeat; background-color:#fff; width:300px; height:300px;">
</div>
</body>
</html>