网址导航由于HITS算法的作用，所以有很好的效果。本文实例为大家分享了js网页定位导航的具体代码，供大家参考，具体内容如下
一个循环判断当前滚动到的位置，另一个循环遍历导航条判断其id是否与滚动到的位置相同
效果如图：
实现代码：
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<!DOCTYPE html>
<
html
>
<
head
lang
=
"en"
>
<
meta
charset
=
"UTF-8"
>
<
title
>地狗购物网--网页定位导航效果</
title
>
<
style
type
=
"text/css"
>
*{
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: 12px;
font-weight: bold;
border-bottom: 2px solid #0088bb;
margin-bottom: 10px;
}
#content .item li{
display: inline;
margin-left:10px ;
}
#content .item li a img{
width: 230px;
height: 230px;
border: none;
}
#menu{
position: fixed;
top: 100px;
left: 50%;
margin-left: 400px;
width: 80px;
}
#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-align: center;
text-decoration: none;
}
#menu ul li a:hover{
color: #fff;
background: #0088bb;
}
#menu ul li .current{
color: #fff;
background: #0088bb;
}
</
style
>
<
script
type
=
"text/javascript"
>
window.onload = function(){
window.onscroll=function(){
var top = document.documentElement.scrollTop || document.body.scrollTop;
var menus = document.getElementById("menu").getElementsByTagName("a");
var items=document.getElementById("content").getElementsByClassName("item");
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!=""){
//给正确的menu下的a元素class赋值
for(var j=0;j<
menus.length
;j++){
var
_menu
=
menus
[j];
var
_href
=
_menu
.href.split("#");//因为只通过href获取的链接为一长串链接，需要通过#分成数组
if(_href[_href.length-1]!=currentId){
_menu.className
=
""
;
}else{
_menu.className
=
" current"
;
}
}
}
}
}
</script>
</
head
>
<
body
>
<
div
id
=
"menu"
>
<
ul
>
<
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
=
"img/1F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/1F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/1F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/1F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/1F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/1F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/1F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/1F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/1F.jpg"
alt
=
""
/></
a
></
li
>
</
ul
>
</
div
>
<
div
id
=
"item2"
class
=
"item"
>
<
h2
>2F 女装</
h2
>
<
ul
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/2F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/2F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/2F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/2F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/2F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/2F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/2F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/2F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/2F.jpg"
alt
=
""
/></
a
></
li
>
</
ul
>
</
div
>
<
div
id
=
"item3"
class
=
"item"
>
<
h2
>3F 美妆</
h2
>
<
ul
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/3F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/3F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/3F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/3F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/3F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/3F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/3F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/3F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/3F.jpg"
alt
=
""
/></
a
></
li
>
</
ul
>
</
div
>
<
div
id
=
"item4"
class
=
"item"
>
<
h2
>4F 数码</
h2
>
<
ul
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/4F.png"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/4F.png"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/4F.png"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/4F.png"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/4F.png"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/4F.png"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/4F.png"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/4F.png"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/4F.png"
alt
=
""
/></
a
></
li
>
</
ul
>
</
div
>
<
div
id
=
"item5"
class
=
"item"
>
<
h2
>5F 母婴</
h2
>
<
ul
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/5F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/5F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/5F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/5F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/5F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/5F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/5F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/5F.jpg"
alt
=
""
/></
a
></
li
>
<
li
><
a
href
=
"#"
><
img
src
=
"img/5F.jpg"
alt
=
""
/></
a
></
li
>
</
ul
>
</
div
>
</
div
>
</
body
>
</
html
>
|
以上就是实用网址导航的全部内容，希望对大家的学习有所帮助，也希望大家多多支持脚本之家。