jquery 悬浮div，滚动条跟随
<!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>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<title>JQuery 漂浮</title>
<script language="JavaScript" src="http://ajax.googleapis.com/ajax/libs/jquery/1.4.2/jquery.min.js"></script>
<script type="text/javascript">
var top = 0;
var percent = 1;
function scroll() {
var documentTop = parseInt($(document).scrollTop())+100;
if(documentTop > top) {
percent = Math.floor((documentTop - top)*0.1);
$('#test').css('top',top+'px');
top = top+percent;
} else if(documentTop < top) {
percent = Math.floor((top - documentTop)*0.1);
$('#test').css('top',top+'px');
top = top-percent;
}
}
function scrollOnLoad() {
setInterval("scroll()",1);
}
$(function(){
$(window).scroll(function(){
top = parseInt($('#test').css('top'));
});
scrollOnLoad();
});
</script>
</head>
<body>
<div id="test" style="position: absolute; top:100px; right:200px; width:100px; height:200px; background:#0033FF;">test
hello world!
</div>
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</body>
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