慕粉18813290620
2016-08-09 22:00
<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8"/>
<title>地狗购物网——网页定位导航效果</title>
<style>
* {
margin: 0;
padding: 0;
}
body {
font-size: 12px;
line-height: 1.7;
}
li {
list-style: none;
}
#content {
width: 800px;
margin: 0 auto;
padding: 20px;
}
#content h1 {
color: #0088bb;
}
#content .item {
padding: 20px;
margin-bottom: 20px;
border: 1px dotted #0088bb;
}
#content .item h2 {
font-size: 16px;
font-weight: bold;
border-bottom: 2px solid #0088bb;
margin-bottom: 10px;
}
#content .item li {
display: inline;
margin-right: 10px;
}
#content .item li a img {
width: 230px;
height: 230px;
border: none;
}
/*请补充此处代码,让导航菜单在右侧绝对定位显示*/
#menu{
position:fixed;
top:100px;
left:50%;
margin-left:400px;
}
#menu ul li a {
display: block;
margin: 5px 0;
font-size: 14px;
font-weight: bold;
color: #333;
width: 80px;
height: 50px;
line-height: 50px;
text-decoration: none;
text-align: center;
}
#menu ul li a:hover,
#menu ul li a.current {
color: #fff;
background: #0088bb;
}
/*ie6 hack*/
* html, * html body {
background-image: url(about:blank);
background-attachment: fixed;
}
* html #menu {
/*position: fixed;*/
position: absolute;
top: expression(((e=document.documentElement.scrollTop)?e:document.body.scrollTop)+100+'px');
}
</style>
<script src="http://libs.baidu.com/jquery/1.10.2/jquery.js"></script>
<script>
function getByClass(obj,cla){
var elements=obj.getElementsByTagName('*');
var result=[];
for(var i=0;i<elements.length;i++){
if(elements[i].className==cla){
result.push(elements[i]);
}
}
return result;
}
//滚动条发生滚动时,要获取相应的值。
window.onload=function(){
window.onscroll=function(){
var Lis=document.getElementById('menu').getElementsByTagName('a');
var items=getByClass(document.getElementById('content'),'item');
var top=document.documentElement?document.documentElement.scrollTop:document.body.scrollTop;
var currentId='';
for(var i=0;i<items.length;i++){
var _item=items[i];
var itemTop=_item.offsetTop;
if(top>itemTop-200){
currentId=_item.id;
}else{
break;
}
}
if(currentId){
for(var j=0;j<Lis.length;j++){
var _Lis=Lis[j];
var _href=_Lis.href.split("#");
if(_href[_href.length-1]!=currentId){
_Lis.removeClass="current";
} else{
_Lis.addClass='current';
}
}
}
}
}
//请补充此处代码,让导航菜单实现在滚动条滚动的时候自动设置焦点
//给相应楼层的a 设置 current,取消其他链接的current
</script>
</head>
<body>
<div id="menu">
<ul>
<!--运用锚点,实现导航定位。-->
<li><a href="#item1" class="current">1F 男装</a></li>
<li><a href="#item2">2F 女装</a></li>
<li><a href="#item3">3F 美妆</a></li>
<li><a href="#item4">4F 数码</a></li>
<li><a href="#item5">5F 母婴</a></li>
</ul>
</div>
<div id="content">
<h1>地狗购物网</h1>
<div id="item1" class="item">
<h2>1F 男装</h2>
<ul>
<li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li>
</ul>
</div>
<div id="item2" class="item">
<h2>2F 女装</h2>
<ul>
<li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li>
</ul>
</div>
<div id="item3" class="item">
<h2>3F 美妆</h2>
<ul>
<li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li>
</ul>
</div>
<div id="item4" class="item">
<h2>4F 数码</h2>
<ul>
<li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li>
</ul>
</div>
<div id="item5" class="item">
<h2>5F 母婴</h2>
<ul>
<li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li>
<li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li>
</ul>
</div>
</div>
</body>
</html>
把class的添加移除方法改下就可以了,你用的是JQ的方法,JS的没有这个用法
<!DOCTYPE html> <html> <head> <meta charset="utf-8"/> <title>地狗购物网——网页定位导航效果</title> <style> * { margin: 0; padding: 0; } body { font-size: 12px; line-height: 1.7; } li { list-style: none; } #content { width: 800px; margin: 0 auto; padding: 20px; } #content h1 { color: #0088bb; } #content .item { padding: 20px; margin-bottom: 20px; border: 1px dotted #0088bb; } #content .item h2 { font-size: 16px; font-weight: bold; border-bottom: 2px solid #0088bb; margin-bottom: 10px; } #content .item li { display: inline; margin-right: 10px; } #content .item li a img { width: 230px; height: 230px; border: none; } /*请补充此处代码,让导航菜单在右侧绝对定位显示*/ #menu{ position:fixed; top:100px; left:50%; margin-left:400px; } #menu ul li a { display: block; margin: 5px 0; font-size: 14px; font-weight: bold; color: #333; width: 80px; height: 50px; line-height: 50px; text-decoration: none; text-align: center; } #menu ul li a:hover, #menu ul li a.current { color: #fff; background: #0088bb; } /*ie6 hack*/ * html, * html body { background-image: url(about:blank); background-attachment: fixed; } * html #menu { /*position: fixed;*/ position: absolute; top: expression(((e=document.documentElement.scrollTop)?e:document.body.scrollTop)+100+'px'); } </style> <script src="http://libs.baidu.com/jquery/1.10.2/jquery.js"></script> <script> function getByClass(obj,cla){ var elements=obj.getElementsByTagName('*'); var result=[]; for(var i=0;i<elements.length;i++){ if(elements[i].className==cla){ result.push(elements[i]); } } return result; } //滚动条发生滚动时,要获取相应的值。 window.onload=function(){ window.onscroll=function(){ var Lis=document.getElementById('menu').getElementsByTagName('a'); var items=getByClass(document.getElementById('content'),'item'); var top=document.documentElement.scrollTop ? document.documentElement .scrollTop : document.body.scrollTop; var currentId=""; for(var i=0;i<items.length;i++){ var _item=items[i]; var itemTop=_item.offsetTop; if(top>itemTop-200){ currentId=_item.id; }else{ break; } } if(currentId){ for(var j=0;j<Lis.length;j++){ var _Lis=Lis[j]; var _href=_Lis.href.split("#"); if(_href[_href.length-1]!=currentId){ _Lis.className = " "; }else{ _Lis.className ='current'; } } } } } //请补充此处代码,让导航菜单实现在滚动条滚动的时候自动设置焦点 //给相应楼层的a 设置 current,取消其他链接的current </script> </head> <body> <div id="menu"> <ul> <!--运用锚点,实现导航定位。--> <li><a href="#item1" class="current">1F 男装</a></li> <li><a href="#item2">2F 女装</a></li> <li><a href="#item3">3F 美妆</a></li> <li><a href="#item4">4F 数码</a></li> <li><a href="#item5">5F 母婴</a></li> </ul> </div> <div id="content"> <h1>地狗购物网</h1> <div id="item1" class="item"> <h2>1F 男装</h2> <ul> <li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/53660fce0001111903990422.jpg" alt=""/></a></li> </ul> </div> <div id="item2" class="item"> <h2>2F 女装</h2> <ul> <li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/5366104c0001e5c403990422.jpg" alt=""/></a></li> </ul> </div> <div id="item3" class="item"> <h2>3F 美妆</h2> <ul> <li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610820001cf5b03990422.jpg" alt=""/></a></li> </ul> </div> <div id="item4" class="item"> <h2>4F 数码</h2> <ul> <li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610ac00012df703990422.jpg" alt=""/></a></li> </ul> </div> <div id="item5" class="item"> <h2>5F 母婴</h2> <ul> <li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li> <li><a href="#"><img src="http://img.mukewang.com/536610cd0001f34603990422.jpg" alt=""/></a></li> </ul> </div> </div> </body> </html>
top获取不正确
var top=document.documentElement.scrollTop||document.body.scrollTop;
试一下!
网页定位导航特效
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