繁體中文当前位置: 首页 > 图文教程 > 网络编程 > Javascript > jquery实现的超出屏幕时把固定层变为定位层的代码
- Javascript
- form中限制文本字节数js代码
- use jscript with List Proxy Server Information
- use jscript List Installed Software
- List Installed Software Features
- List Information About the Binary Files Used by an Application
- List the Codec Files on a Computer
- List the UTC Time on a Computer
- List Installed Hot Fixes
- excel操作之Add Data to a Spreadsheet Cell
- Add Formatted Data to a Spreadsheet
- Apply an AutoFormat to an Excel Spreadsheet
- JavaScript语法着色引擎（demo及打包文件下载）
- 类之Prototype.js学习
- 一款JavaScript压缩工具：X2JSCompactor
- iis6+javascript Add an Extension File
- jscript之Open an Excel Spreadsheet
- jscript之Read an Excel Spreadsheet
- jscript之List Excel Color Values
- 去除图像或链接黑眼圈的两种方法总结
- Add a Formatted Table to a Word Document
Javascript 中的 jquery实现的超出屏幕时把固定层变为定位层的代码
出处:互联网 整理: 软晨网（RuanChen.com） 发布: 2010-02-27 浏览: 334 ::
收藏到网摘: n/a
相信很多人都上过taobao吧，在taobao的产品列表页有一个浮动的用来排序的浮动层，当你拖动滚动条而导致那个排序栏看不到的时候它会自动变为浮动层，一直固定在那里。 非常好的一个用户体验实例。如果不明白的话就看下面的图片吧
淘宝产品列表 http://search1.taobao.com/browse/50010388/…
腾讯财经产业经济 http://finance.qq.com/industry/index.htm
如何实现？
scrollTop是什么？当元素内部的内容高度超过元素本身的高度时就会出现滚动条，随着拖动滚动条而被隐去的上面部分的高度就是scrollTop值。
这种定位层就是当页面触发onscroll事件时，取得scrollTop值并写入定位层CSS属性，使之保持位置。
下面是实例代码
复制代码 代码如下:
<!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>定位层</title>
<script type="text/javascript" src="/upload/tech/20100227/20100227014859_1d7f7abc18fcb43975065399b0d1e48e.js"></script>
<style type="text/css">
body{padding:10px;margin:0;}
#box{width:960px;margin:0 auto;}
#box1{width:250px;height:25px;position:relative;}
#box1_1{width:250px;height:25px;line-height:25px;background:#f00;color:#fff;}
p{font-size:24px;margin:10px 0;}
</style>
<script type="text/javascript">
function tools(){
var top=$(document).scrollTop();
if(($.browser.msie==true)&&($.browser.version==6.0)){
if(top>168)$("#box1_1").css({position:"absolute",top:top-168});
}else{
if(top>168)$("#box1_1").css({position:"fixed",top:"-"&top+"px"});
}
if(top<=168)$("#box1_1").css({position:"static",top:0});
}
$(function(){
window.onscroll=tools;
window.onresize=tools;
});
</script>
</head>
<body>
<div id="box">
<p>往下拖动滚动条↓<a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<div id="box1"><div id="box1_1">这里是定位层</div></div>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
<p><a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">ruanchen.com</a> <a href="http://www.ruanchen.com">软晨学习网</a></p>
</div>
</body>
</html>
评论 (0) All
