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基于JavaScript實(shí)現(xiàn)div層跟隨滾動(dòng)條滑動(dòng)

更新時(shí)間：2016年01月12日 14:39:59 作者：柔城

項(xiàng)目需求是這樣的：在一個(gè)頁(yè)面放2個(gè)懸浮框，懸浮框隨頁(yè)面的上下滾動(dòng)有上下波動(dòng)的效果，最終固定在同一位置，下面通過(guò)本文給大家分享基于JavaScript實(shí)現(xiàn)div層跟隨滾動(dòng)條滑動(dòng)的相關(guān)資料，對(duì)js div跟隨滾動(dòng)條滑動(dòng)相關(guān)知識(shí)感興趣的朋友一起學(xué)習(xí)吧

在一個(gè)頁(yè)面放2個(gè)懸浮框，懸浮框隨頁(yè)面的上下滾動(dòng)有上下波動(dòng)的效果，最終固定在同一位置

效果展示如下所示：

代碼如下：

<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title>JavScript頁(yè)面懸浮框- 何問(wèn)起</title><base target="_blank" />
<style>
body {
height: 2000px;
}
#div1 {
width: 100px;
height: 150px;
background: red;
position: absolute;
right: 0;
top:200px;
}
#div2 {
width: 200px;
height: 200px;
background: green;
position: absolute;
left: 0;
top: 200px;
}a{color:white}
</style>
</head>
<body>
<div id="div1"><a >何問(wèn)起</a> <a >特效</a></div>
<div id="div2"><a >原文</a>
<a >效果</a>
</div>
<div id="hovertree" style="position:fixed;top:100px;left:40%;z-index:99;height:100px;width:100px;background-color:silver"></div>
<div>在一個(gè)頁(yè)面放2個(gè)懸浮框，懸浮框隨頁(yè)面的上下滾動(dòng)有上下波動(dòng)的效果，最終固定在同一位置</div>
<script>
var h_div1 = document.getElementById('div1'), h_div2 = document.getElementById('div2');
var h_hvttop = 200;
window.onscroll = function () {
HoverTreeMove(h_div1, h_hvttop)
HoverTreeMove(h_div2, h_hvttop)
//顯示信息
var h_scrollTop = document.documentElement.scrollTop || document.body.scrollTop;//滾動(dòng)的距離
var h_hovertree = document.getElementById('hovertree'); 
h_hovertree.innerHTML = h_div1.offsetTop + " hovertree<br /> " + h_scrollTop + "<br />" + h_div1.style.top;
};
function HoverTreeMove(obj,top)
{
var h_scrollTop = document.documentElement.scrollTop || document.body.scrollTop;//滾動(dòng)的距離
var h_buchang = 20;
if (obj.offsetTop < h_scrollTop + top - h_buchang)
{
obj.style.top = obj.offsetTop + h_buchang + "px";
setTimeout(function () { HoverTreeMove(obj, top); }, 80);
}
else if (obj.offsetTop > h_scrollTop + top + h_buchang)
{
obj.style.top = (obj.offsetTop - h_buchang) + "px";
setTimeout(function () { HoverTreeMove(obj, top); }, 80);
}
else {
obj.style.top = h_scrollTop + top + "px";
}
}
HoverTreeMove(h_div1, 200)
HoverTreeMove(h_div2, 200)
</script>
</body>
</html>

下面給大家分享一段代碼頁(yè)面頂端固定div，不隨滾動(dòng)條移動(dòng)，提示瀏覽器信息

例子1：

<html>
<head>
<style type="text/css">
#topNavWrapper {
height: 29px;
margin: 0px auto;
min-width:1000px;
z-index:100;
_position: relative ;
_top:0px; 
}
#topNav 
{
width:100%;
display: block;
z-index: 100;
overflow: visible;
position: fixed;
top: 0px; 
_position: absolute;
_top: expression(documentElement.scrollTop-5 + "px");
background-color:#EBEBEB;
border-bottom-style:solid;
border-bottom-width:1px;
border-bottom-color:#D0D0D0;
height: 28px;
min-width:1000px;
}
#top
{
margin: 0px auto;
width:1000px;
position:relative;
} 
.left
{
left:5px;
top:6px;
width:200px;
position:absolute;
}
.leftlx
{
left:205px;
top:6px;
width:300px;
position:absolute;
}
.right
{
left:830px;
top:6px;
width:170px;
position:absolute;
}
#top a
{
text-decoration: none;
color:#747474;
}
#top a:hover
{
color: blue;
text-decoration: underline;
}
</style>
</head>
<body>
<div id="topNavWrapper">
<div id="topNav">
<div id="top">
<div class="left">您好!歡迎來(lái)到....^ ^</div><div class="leftlx"><a href="about.aspx?id=1">[聯(lián)系我們]</a>&nbsp;&nbsp;客戶服務(wù)熱線: 400-699-1111</div>
<div class="right">
<table cellpadding="0" cellspacing="0"><tr><td><a href="#">簡(jiǎn)體中文</a></td><td>|</td><td><a href="big5.html">繁體中文</a></td>
<td>|</td><td><a onclick='window.external.addFavorite("http://www.xxxx.com","xxxx")' href="#">收藏本站</a></td></tr></table>
</div>
</div>
</div>
</div>
</body>
</html>

例子2：

<style type="text/css">
{
margin: 0px;
padding: 0px;
}
body {
background-attachment: fixed; /* prevent screen flash in IE6 */
}
#topNavWrapper {
width: 100%;
text-align: left;
height: 28px;
margin: 0px auto;
z-index:100;
_position: relative ;
_top:0px;
}
#topNav {
width: 100%;
float: left;
display: block;
z-index: 100;
overflow: visible;
position: fixed;
top: 0px; /* position fixed for IE6 */
_position: absolute;
_top: expression(documentElement.scrollTop + "px");
height: 28px;
}
</style>

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