1、新建html文档。
2、书写hmtl代码。<ul><li><A class="hover" href="#">前端交流</A></li><li><A href="#">交互设计</A></li><li><A href="#">视觉设计</A></li><li><A href="#">用户研究</A></li><li><A href="#">设计茶吧</A></li><li><A href="#">前端交流</A></li><li><A href="#">团队生活</A></li><div id="lanPos"></div></ul>
3、书写css代码。<style>html, body, div, span, object, iframe, h1, h2, h3, h4, h5, h6, p, blockquote, pre, abbr, address, cite, code, del, dfn, em, img, ins, kbd, q, samp, small, strong, sub, sup, var, b, i, dl, dt, dd, ol, ul, li, fieldset, form, label, legend, table, caption, tbody, tfoot, thead, tr, th, td, article, aside, canvas, details, figcaption, figure, footer, header, hgroup, menu, nav, section, summary, time, mark, audio, video { margin: 0; padding: 0; border: 0; outline: 0; font-size: 100%; vertical-align: baseline; background: transparent; font-weight: normal; }body { line-height: 1; }:focus { outline: 1; }article, aside, canvas, details, figcaption, figure, footer, header, hgroup, menu, nav, section, summary { display: block; }nav ul, ul, li { list-style: none; }blockquote, q { quotes: none; }blockquote:before, blockquote:after, q:before, q:after { content: ''; content: none; }a { margin: 0; padding: 0; border: 0; font-size: 100%; vertical-align: baseline; background: transparent; text-decoration: none; }a:hover { text-decoration: underline; }ins { background-color: #ff9; color: #000; text-decoration: none; }mark { background-color: #ff9; color: #000; font-style: italic; font-weight: bold; }del { text-decoration: line-through; }abbr[title], dfn[title] { border-bottom: 1px dotted #000; cursor: help; }table { border-collapse: collapse; border-spacing: 0; }hr { display: block; height: 1px; border: 0; border-top: 1px solid #cccccc; margin: 1em 0; padding: 0; }input, select { vertical-align: middle; }.fl { float: left; display: inline-block; }.fr { float: right; display: inline-block; }.clearfix:after { visibility: hidden; display: block; font-size: 0; content: " "; clear: both; height: 0; }.clearfix { display: inline-table; }* html .clearfix { height: 1%; }.clearfix { display: block; }html { font-size: 62.5%; /* 10÷16=62.5% */ }body { font-size: 12px; font-size: 1.2rem; background: #F8F8F8; font-family: "宋体"; }ul { width: 180px; margin: 0 auto; background: #fff; position: relative; z-index: 0; padding: 60px 20px 70px; }ul li { height: 40px; line-height: 40px; text-align: center; border-bottom: 1px solid #F8F8F8; }ul li a { color: #666; display: block; }ul li a:hover { color: #FF5F3E; text-decoration: none; }ul li a.hover { color: #FF5F3E; }#lanPos { width: 225px; height: 40px; line-height: 40px; background: #F8F8F8; border-left: 5px solid #FF5F3E; position: absolute; left: -5px; top: 0; z-index: -1; transition: top .2s; }</style>
4、书写并引用js代码。<script src="js/jquery.min.js"></script><script>$(function(){ $('#lanPos').css('top',$('.hover').offset().top); $('ul li').hover(function(){ $('#lanPos').css('top',$(this).offset().top); },function(){ $('#lanPos').css('top',$('.hover').offset().top); }) $('ul li').click(function(){ for(var i=0;i<$('ul li').size();i++){ if(this==$('ul li').get(i)){ $('ul li').eq(i).children('a').addClass('hover'); }else{ $('ul li').eq(i).children('a').removeClass('hover'); } } }) })</script>
5、代码整体结构。
6、查看效果
