本帖最后由 liyueyang165 于 2012-06-12 12:46:28 編輯

<script type="text/javascript">        backTop = function (btnId){        var btn = document.getElementById(btnId);        var d = document.documentElement;        window.onscroll = set;        btn.onclick = function () {            btn.style.display = "none";            window.onscroll = null;            this.timer = setInterval(function () {                d.scrollTop -= Math.ceil(d.scrollTop * 0.1);                if (d.scrollTop == 0) clearInterval(btn.timer, window.onscroll = set);            }, 10);        };        function set() { btn.style.display = d.scrollTop ? 'block' : "none" }    };    backTop('gotopbtn');

<a id="gotopbtn" style="position:fixed;width:12px;bottom:95px;right:195px;display:none;cursor:pointer;">返回頂部</a>

回復(fù)討論(解決方案)

Chrome and Safari always use document.body.scrollTop, while IE and Firefox use document.body.scrollTop for quirks mode and document.documentElement.scrollTop for standard mode.
Your best bet may be something like:

var scrollTop = document.body.scrollTop || document.documentElement.scrollTop;
var scrolLeft = document.body.scrollLeft || document.documentElement.scrollLeft;

Chrome and Safari always use document.body.scrollTop, while IE and Firefox use document.body.scrollTop for quirks mode and document.documentElement.scrollTop for standard mode.
Your best bet may be……

我這個(gè)怎么修改呢。。

backTop = function (btnId) {                var btn = document.getElementById(btnId);                var d1 = document.documentElement;                var d2 = document.body;                var d = d1.scrollTop + d2.scrollTop;                window.onscroll = set;                btn.onclick = function () {                    btn.style.display = "none";                    window.onscroll = null;                    this.timer = setInterval(function () {                        d -= Math.ceil(d* 0.1);                        if (d == 0) clearInterval(btn.timer, window.onscroll = set);                    }, 10);                };                function set() { btn.style.display = d ? 'block' : "none" }            };            backTop('gotopbtn');

試試這個(gè)

JScript?code
backTop?=?function?(btnId)?{
????????????????var?btn?=?document.getElementById(btnId);
????????????????var?d1?=?document.documentElement;
????????????????var?d2?=?document.body;
???????……

不行吖。。直接隱藏了??不顯示了

引用?4?樓??的回復(fù):

引用?3?樓??的回復(fù):

JScript?code
backTop?=?function?(btnId)?{
var?btn?=?document.getElementById(btnId);
var?d1?=?document.documentElement;
var?d2?=?document.body;
……


不行吖。。直接隱藏了?……

不返回首頁了。

nbsp;HTML>

OK了?。?！thank?you！

nbsp;HTML>

IE6不行啊。在左邊

nbsp;HTML>

這個(gè)可以呀！