js控制固定div和随屏滚动div兼容多浏览器和纯css控制（来自网络） 

 1 <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
 2 <html xmlns="http://www.w3.org/1999/xhtml">
 3 <head>
 4     <meta http-equiv="Content-Type" content="text/html; charset=gbk" />
 5     <title>右下角div固定</title>
 6     <style type="text/css">
 7         html, body
 8         {
 9             padding: 0;
10             margin: 0;
11         }
12     </style>
13 </head>
14 <body>
15     <div id="aa" style="width: 100px; height: 100px; background: #c0c0c0;">随平滚懂div</div>
16     <div id="bb" style="width: 100px; height: 100px; background: #c0c0c0;">静止不动div</div>
17     <div style="width: 100%; height: 1500px; background: #000"></div>
18     <div style="width: 100%; height: 1500px; background: green"></div>
19     <div style="width: 100%; height: 1500px; background: red"></div>
20 </body>
21 </html>
22 <script type="text/javascript">
23     function scrollx(p) {
24         var d = document, dd = d.documentElement, db = d.body, w = window, o = d.getElementById(p.id), ie6 = /msie 6/i.test(navigator.userAgent), style, timer;
25         if (o) {
26             o.style.cssText += ";position:" + (p.f && !ie6 ? 'fixed' : 'absolute') + ";" + (p.l == undefined ? 'right:0;' : 'left:' + p.l + 'px;') + (p.t != undefined ? 'top:' + p.t + 'px' : 'bottom:0');
27             if (p.f && ie6) {
28                 o.style.cssText += ';left:expression(documentElement.scrollLeft + ' + (p.l == undefined ? dd.clientWidth - o.offsetWidth : p.l) + ' + "px");top:expression(documentElement.scrollTop +' + (p.t == undefined ? dd.clientHeight - o.offsetHeight : p.t) + '+ "px" );';
29                 dd.style.cssText += ';background-image: url(about:blank);background-attachment:fixed;';
30             } else {
31                 if (!p.f) {
32                     w.onresize = w.onscroll = function () {
33                         clearInterval(timer);
34                         timer = setInterval(function () {
35                             //双选择为了修复chrome 下xhtml解析时dd.scrollTop为 0 
36                             var st = (dd.scrollTop || db.scrollTop), c;
37                             c = st - o.offsetTop + (p.t != undefined ? p.t : (w.innerHeight || dd.clientHeight) - o.offsetHeight);
38                             if (c != 0) {
39                                 o.style.top = o.offsetTop + Math.ceil(Math.abs(c) / 10) * (c < 0 ? -1 : 1) + 'px';
40                             } else {
41                                 clearInterval(timer);
42                             }
43                         }, 10)
44                     }
45                 }
46             }
47         }
48     }
49     scrollx({
50         id: 'aa'
51     })
52     scrollx({
53         id: 'bb',
54         l: 0,
55         t: 200,
56         f: 1
57     })
58     /* 
59     id 你要滚动的内容的id 
60     l 横坐标的位置 不写为紧贴右边 
61     t 你要放在页面的那个位置默认是贴着底边 0是贴着顶边 
62     f 1表示固定 不写或者0表示滚动 
63     */
64 </script>

本文来自：http://www.jzxue.com/wangyesheji/wangyetexiao/201011/09-4940.html 

方式二：纯css控制且半透明效果，但兼容性较差

1 #div_digg{ position:fixed; _position:absolute;z-index:1000;bottom:0; right:0; _right:17px; background-color:#FFFFFF;border:2px solid red;filter:alpha(Opacity=80);-moz-opacity:0.5;opacity: 0.5; }

右下角固定层效果，用于广告的较多。这里既然在网上看到，收藏在此。以备不时之需......

posted @ 2013-09-17 14:14  wolfy  阅读(860)  评论(0)  编辑  收藏  举报