更新时间:2022-10-01 20:00:38
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
|
<!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 >弹性返回顶部JS代码</ title >
< script type = "text/javascript" >
function goTopEx() { var obj = document.getElementById("goTopBtn"); function getScrollTop() { return document.documentElement.scrollTop + document.body.scrollTop; } function setScrollTop(value) { if (document.documentElement.scrollTop) { document.documentElement.scrollTop = value; } else { document.body.scrollTop = value; } } window.onscroll = function() { getScrollTop() > 0 ? obj.style.display = "": obj.style.display = "none"; } obj.onclick = function() { var goTop = setInterval(scrollMove, 10); function scrollMove() { setScrollTop(getScrollTop() / 1.1); if (getScrollTop() < 1) clearInterval(goTop); } } } </ script >
< style >
BODY { HEIGHT: 3600px; } #goTopBtn { POSITION: fixed; TEXT-ALIGN: center; LINE-HEIGHT: 30px; WIDTH: 30px; BOTTOM: 35px; HEIGHT: 33px; FONT-SIZE: 12px; CURSOR: pointer; RIGHT: 0px; _position: absolute; _right: auto } </ style >
</ head >
< body style = "text-align:center" >
< div style = "display: none" id = "goTopBtn" >< img border = 0 src = "/${res}/img/go_to_top.png" ></ div >
< script type = text /javascript>goTopEx();</ script >
< br />< br />< br />< br />< br />< br />< br />
< p ></ p >
< p >< p >超出首屏范围,即会出现TOP按钮,否则自动隐藏。< br />
</ p ></ p >
< p ></ p >
</ body >
</ html >
|
原文链接:http://www.jb51.net/article/38228.htm
本文转自 小旭依然 51CTO博客,原文链接:http://blog.51cto.com/xuyran/1788311