jQuery 导航自动跟随滚动的实现代码

具体代码如下所示：

<%@ page language="java" contentType="text/html; charset=UTF-8" pageEncoding="UTF-8"%> <%@ taglib prefix="c" uri="http://java.sun.com/jsp/jstl/core" %>   <c:set var="front" value="${frontPath}${pageContext.request.contextPath}/f"/> <c:set var="ajaxUrl" value="${frontPath}${pageContext.request.contextPath}"/> <c:set var="ctxStatic" value="${pageContext.request.contextPath}/static"/> <!DOCTYPE html> <html lang="en"> <head>   <meta charset="UTF-8"/>   <meta name="format-detection" content="telephone=no,email=no,adress=no"/>   <meta name="viewport"      content="width=device-width, initial-scale=1.0, maximum-scale=1.0, minimum-scale=1.0, user-scalable=no"/>   <meta name="apple-mobile-web-app-capable" content="yes"/>   <meta name="apple-mobile-web-app-status-bar-style" content="black"/>   <title>simpleNavFollowing</title>   <style>     * {       margin: 0;       padding: 0;     }     html, body {       position: relative;       height: 100%;     }     #nav {       position: fixed;       top: 50%;       left: 20px;       margin-top: -140px;       display: inline-block;       vertical-align: middle;     }     #nav a{       display: block;       position: relative;       width: 98px;       height: 28px;       line-height: 28px;       text-align: center;       background-color: #eee;       color: #333;       border-left: 2px solid transparent;     }     #nav a:hover{       width: 98px;       border-left: 2px solid #4b59ff;     }     #nav a p{       position: relative;       z-index: 3;     }     #nav a.active{       background-color: #4b59ff;       color: #fff;     }     #main {       max-width: 1200px;       margin: 0 auto;     }     #main div {       height: 300px;       background-color: #efefef;       border-top: 1px solid #ccc;     }     #main div:nth-child(2n) {       background-color: #fafafa;     }   </style>   <script src="http://www.jq22.com/jquery/jquery-1.10.2.js"></script>   <script>     $(function () {       var nav = $("#nav");       var mainPage = $(".mainPage");       var mainTopArr = new Array();       for(var i=0;i<mainPage.length;i++){         var top = mainPage.eq(i).offset().top;         mainTopArr.push(top);       }       $(window).scroll(function(){         var scrollTop = $(this).scrollTop();         var k;         for(var i=0;i<mainTopArr.length;i++){           if(scrollTop>=mainTopArr[i]){             k=i;           }         }         nav.find("a").eq(k).addClass("active").siblings().removeClass("active");       });       nav.find("a[href^='#']").click(function(e){         e.preventDefault();         $('html, body').animate({scrollTop: $(this.hash).offset().top}, 400);       });     });   </script> </head> <body> <div id="nav">   <a href="#page1" rel="external nofollow" class="active">page1</a>   <a href="#page2" rel="external nofollow" >page2</a>   <a href="#page3" rel="external nofollow" >page3</a>   <a href="#page4" rel="external nofollow" >page4</a>   <a href="#page5" rel="external nofollow" >page5</a>   <a href="#page6" rel="external nofollow" >page6</a>   <a href="#page7" rel="external nofollow" >page7</a>   <a href="#page8" rel="external nofollow" >page8</a>   <a href="#page9" rel="external nofollow" >page9</a>   <a href="#page10" rel="external nofollow" >page10</a> </div> <div id="main">   <div class="mainPage" id="page1">page1</div>   <div class="mainPage" id="page2" style="height: 400px;">page2</div>   <div class="mainPage" id="page3">page3</div>   <div class="mainPage" id="page4">page4</div>   <div class="mainPage" id="page5" style="height: 300px;">page5</div>   <div class="mainPage" id="page6">page6</div>   <div class="mainPage" id="page7">page7</div>   <div class="mainPage" id="page8">page8</div>   <div class="mainPage" id="page9" style="height: 900px;">page9</div>   <div class="mainPage" id="page10">page10</div>   <div class="mainPage" id="page11" style="height: 900px;">page11</div> </div> </body> </html>

总结

以上所述是小编给大家介绍的jQuery 导航自动跟随滚动的实现代码，希望对大家有所帮助，如果大家有任何疑问请给我留言，小编会及时回复大家的。在此也非常感谢大家对脚本之家网站的支持！