//js function getId(id) { return typeof id === 'string' ? document.getElementById(id) : id; } window.onload = function () { var titLis = getId('notice-title').getElementsByTagName('li'); var mods = getId('notice-content').getElementsByTagName('div'); console.log(mods.length + titLis.length); //确保titles的个数与content个数相等 if (titLis.length != mods.length) return; for(var i = 0;i < titLis.length; i ++) { console.log(titLis[i]); //给每个li加上索引属性id,方便后面的content里面的div调用 titLis[i].id = i; //鼠标滑过时给每一个li元素加上select高亮显示 titLis[i].onmouseover = function() { for(var j = 0;j < titLis.length;j ++) { titLis[j].className = '';//添加高亮之前去除之前的高亮样式,不然就会点一个高亮增加一个,而不是只选中一个 mods[j].style.display = 'none'; //全部隐藏,方便后边mods显示内容 } this.className = 'select'; mods[this.id].style.display = 'block'; } } } //CSS * { padding: 0; margin: 0; font-size: 16px; list-style: none; text-decoration: none; } .notice { width: 298px; height: 98px; border: 1px solid #eee; overflow: hidden; margin: 100px auto; } .notice-title { background-color: #f7f7f7; height: 27px; position: relative; } .notice-title ul { width: 301px; left: -1px; //为了不让最左边和最右边的tab的左边框和右边框与最外层的盒子的边框重叠 position: absolute; } .notice-title li { float: left; width: 58px; //301px/5个li元素,每个li元素还要加1px的边框 height: 26px; line-height: 26px; //要加一个底边框,没有高亮的时候 color: black; text-align: center; border-bottom: 1px solid #eee; background-color: #f7f7f7; } .notice-title li.select { background-color: #fff; border-bottom-color: #fff; border-left: 1px solid #eee; border-right: 1px solid #eee; font-weight: bold; } .notice-title li a:link,.notice-title li a:visited { color: black; } .notice-title li a:hover { color: #f90; } .notice-content .mod { overflow: hidden; margin: 10px 10px 10px 19px; } //html <!DOCTYPE html> <html> <head> <meta charset="utf-8"> <title>tab-面向过程的制作多种切换效果</title> <link rel="stylesheet" type="text/css" href="../css/tab_process.css"> <script type="text/javascript" src="../js/tab_process.js"></script> </head> <body> <!-- tab切换外层盒子 --> <div class="notice"> <div class="notice-title" id="notice-title"> <ul> <li class="select"><a href="#">切换1</a></li> <li><a href="#">切换2</a></li> <li><a href="#">切换3</a></li> <li><a href="#">切换4</a></li> <li><a href="#">切换5</a></li> </ul> </div> <div class="notice-content" id="notice-content"> <div class="mod">1111</div> <div class="mod">2222</div> <div class="mod">3333</div> <div class="mod">4444</div> <div class="mod">5555</div> </div> </div> </body> </html>
li元素的索引
切换5的时候多出一部分背景色
运行的效果