div相对浏览器移动

浏览数：24 / 时间：2015年06月11日

<%
   String path = request.getContextPath();
%>
<!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 charset="UTF-8">
    <title>无标题页</title>
    <style type="text/css">
    .scrolldiv{
    width:100px;
    height:200px;
    position:absolute;
    top:300px;
    left:30px;
    background-color:red;
    }
    </style>
    <script type="text/javascript" src="<%=path%>/bbs/js/jquery-1.10.2.js"></script>
</head>
<body style="width:2000px;height:8000px">
<div class="scrolldiv" id="scrolldiv"></div>
</body>
<script type="text/javascript">
var timer;
    $(function(){
        $(window).scroll(function(){
            clearInterval(timer);
            var topScroll=getScroll();
            var topDiv="1px";
            var top=topScroll+parseInt(topDiv);
            timer=setInterval(function(){
                    //$(".test").css("top", top+"px");
                     $(".scrolldiv").animate({"top":top},500);
            },500)
        })
    })
    function getScroll(){
             var bodyTop = 0;
             if (typeof window.pageYOffset != ‘undefined‘) {
                     bodyTop = window.pageYOffset;
             } else if (typeof document.compatMode != ‘undefined‘ && document.compatMode != ‘BackCompat‘) {
                     bodyTop = document.documentElement.scrollTop;
             }
             else if (typeof document.body != ‘undefined‘) {
                     bodyTop = document.body.scrollTop;
             }
             return bodyTop
    }
    </script>
</html>