好的。所以，我正在结束一个开发。我已经实现了一个基于“a”标签的平滑滚动脚本。我没有时间编写另一个脚本，所以我正在寻找一个允许我使用我的脚本的解决方案，但将“a”标签替换为可以让我仅根据菜单使用此效果的东西。我试过用 get class 替换，但功能似乎死了，但也许我实现错了。
下面是我正在使用的 JavaScript：
/* Smooth scrolling
Changes links that link to other parts of this page to scroll
smoothly to those links rather than jump to them directly, which
can be a little disorienting.
sil, http://www.kryogenix.org/
v1.0 2003-11-11
v1.1 2005-06-16 wrap it up in an object
*/
var ss = {
fixAllLinks: function() {
// Get a list of all links in the page
var allLinks = document.getElementsByTagName('a');
// Walk through the list
for (var i=0;i<allLinks.length;i++) {
var lnk = allLinks[i];
if ((lnk.href && lnk.href.indexOf('#') != -1) &&
( (lnk.pathname == location.pathname) ||
('/'+lnk.pathname == location.pathname) ) &&
(lnk.search == location.search)) {
// If the link is internal to the page (begins in #)
// then attach the smoothScroll function as an onclick
// event handler
ss.addEvent(lnk,'click',ss.smoothScroll);
}
}
},
smoothScroll: function(e) {
// This is an event handler; get the clicked on element,
// in a cross-browser fashion
if (window.event) {
target = window.event.srcElement;
} else if (e) {
target = e.target;
} else return;
// Make sure that the target is an element, not a text node
// within an element
if (target.nodeName.toLowerCase() != 'a') {
target = target.parentNode;
}
// Paranoia; check this is an A tag
if (target.nodeName.toLowerCase() != 'a') return;
// Find the <a name> tag corresponding to this href
// First strip off the hash (first character)
anchor = target.hash.substr(1);
// Now loop all A tags until we find one with that name
var allLinks = document.getElementsByTagName('a');
var destinationLink = null;
for (var i=0;i<allLinks.length;i++) {
var lnk = allLinks[i];
if (lnk.name && (lnk.name == anchor)) {
destinationLink = lnk;
break;
}
}
if (!destinationLink) destinationLink = document.getElementById(anchor);
// If we didn't find a destination, give up and let the browser do
// its thing
if (!destinationLink) return true;
// Find the destination's position
var destx = destinationLink.offsetLeft;
var desty = destinationLink.offsetTop;
var thisNode = destinationLink;
while (thisNode.offsetParent &&
(thisNode.offsetParent != document.body)) {
thisNode = thisNode.offsetParent;
destx += thisNode.offsetLeft;
desty += thisNode.offsetTop;
}
// Stop any current scrolling
clearInterval(ss.INTERVAL);
cypos = ss.getCurrentYPos();
ss_stepsize = parseInt((desty-cypos)/ss.STEPS);
ss.INTERVAL =
setInterval('ss.scrollWindow('+ss_stepsize+','+desty+',"'+anchor+'")',10);
// And stop the actual click happening
if (window.event) {
window.event.cancelBubble = true;
window.event.returnValue = false;
}
if (e && e.preventDefault && e.stopPropagation) {
e.preventDefault();
e.stopPropagation();
}
},
scrollWindow: function(scramount,dest,anchor) {
wascypos = ss.getCurrentYPos();
isAbove = (wascypos < dest);
window.scrollTo(0,wascypos + scramount);
iscypos = ss.getCurrentYPos();
isAboveNow = (iscypos < dest);
if ((isAbove != isAboveNow) || (wascypos == iscypos)) {
// if we've just scrolled past the destination, or
// we haven't moved from the last scroll (i.e., we're at the
// bottom of the page) then scroll exactly to the link
window.scrollTo(0,dest);
// cancel the repeating timer
clearInterval(ss.INTERVAL);
// and jump to the link directly so the URL's right
location.hash = anchor;
}
},
getCurrentYPos: function() {
if (document.body && document.body.scrollTop)
return document.body.scrollTop;
if (document.documentElement && document.documentElement.scrollTop)
return document.documentElement.scrollTop;
if (window.pageYOffset)
return window.pageYOffset;
return 0;
},
addEvent: function(elm, evType, fn, useCapture) {
// addEvent and removeEvent
// cross-browser event handling for IE5+, NS6 and Mozilla
// By Scott Andrew
if (elm.addEventListener){
elm.addEventListener(evType, fn, useCapture);
return true;
} else if (elm.attachEvent){
var r = elm.attachEvent("on"+evType, fn);
return r;
} else {
alert("Handler could not be removed");
}
}
}
ss.STEPS = 25;
ss.addEvent(window,"load",ss.fixAllLinks);
注意：我尝试将“按标签获取”行替换为：“ var allLinks = document.getElementsByClassName('mainnav');
相应加价的一个例子是；
<li class='mainnav'><a style="margin-left:3px;" href="#topReception" onMouseOver = "if (document.images) document.top.src= 'http://soniahsieh.com/dev/_images/top-hover.png';" onMouseOut = "if (document.images) document.top.src= 'http://soniahsieh.com/dev/_images/top.png';"><img src="/dev/_images/top.png" name="top" border=0></a></li>
但是，脚本随着这个变化而死。我究竟做错了什么？
更新，尝试 jQuery。
<script src="https://ajax.googleapis.com/ajax/libs/jquery/1.7.2/jquery.min.js"></script>
<script>
$("a.mainnav").each(function() { // go through all links
var href = $(this).attr("href");
if (href.match(/^#/)) { // if href starts with #
$(this).click(function() { // add a click event to it
var name = $(this).attr("href").substring(1); // get the anchor link
// on click, scroll to the a with a name attribute matching the anchor
$('html, body').animate({ scrollTop: $("a[name='" + name + "']").offset().top }, 1000);
});
}
});
</script>
相应的;
<li class='mainnav'><a style="margin-left:3px;" name="topReception" href="#topReception" onMouseOver = "if (document.images) document.top.src= 'http://soniahsieh.com/dev/_images/top-hover.png';" onMouseOut = "if (document.images) document.top.src= '/dev/_images/top.png';"><img src="coolimage/top.png" border=0></a></li>