主菜单划到子菜单但是子菜单不显示
<!DOCTYPE html> <html> <head> <meta charset="UTF-8"> <title>广告轮播</title> <link rel="stylesheet" href="css/index.css"> </head> <body> <div class="main" id="main"> <!-- 导航菜单 --> <!-- menubox定义过透明度，会导致里面内容也是半透面的，所以内容另加 --> <div class="menu-box"></div> <!-- 主菜单 --> <div class="menu-content" id="menu-content"> <div class="menu-item"> <a href=""> <span>手机、配件</span> <i class="iconfont"></i> </a> </div> <div class="menu-item"> <a href=""> <span>电脑</span> <i class="iconfont"></i> </a> </div> <div class="menu-item"> <a href=""> <span>家用电器</span> <i class="iconfont"></i> </a> </div> <div class="menu-item"> <a href=""> <span>家具</span> <i class="iconfont"></i> </a> </div> </div> <!-- 子菜单 --> <div class="sub-menu hide" id="sub-menu"> <!-- 手机、配件 --> <div class="inner-box"> <div class="title">手机、配件</div> <div class="sub-row"> <span class="bold mr10">手机通讯：</span> <a href="#">手机</a> <span class="mr10 ml10">/</span> <a href="#">手机维修</a> <span class="mr10 ml10">/</span> <a href="#">以旧换新</a> </div> <div class="sub-row"> <span class="bold mr10">电脑：</span> <a href="#">手机壳</a> <span class="mr10 ml10">/</span> <a href="#">手机存储卡</a> <span class="mr10 ml10">/</span> <a href="#">数据线</a> <span class="mr10 ml10">/</span> <a href="#">充电器</a> <span class="mr10 ml10">/</span> <a href="#">电池</a> </div> <div class="sub-row"> <span class="bold mr10">运营商：</span> <a href="#">中国联通</a> <span class="mr10 ml10">/</span> <a href="#">中国移动</a> <span class="mr10 ml10">/</span> <a href="#">中国电信</a> </div> <div class="sub-row"> <span class="bold mr10">智能设备：</span> <a href="#">只能手环</a> <span class="mr10 ml10">/</span> <a href="#">智能家居</a> <span class="mr10 ml10">/</span> <a href="#">智能手表</a> <span class="mr10 ml10">/</span> <a href="#">其他配件</a> </div> <div class="sub-row"> <span class="bold mr10">娱乐：</span> <a href="#">耳机</a> <span class="mr10 ml10">/</span> <a href="#">音响</a> <span class="mr10 ml10">/</span> <a href="#">收音机</a> <span class="mr10 ml10">/</span> <a href="#">麦克风</a> </div> </div> <!-- 电脑 --> <div class="inner-box"> <div class="title">电脑</div> <div class="sub-row"> <span class="bold mr10">电脑：</span> <a href="">笔记本</a> <span class="ml10 mr10">/</span> <a href="">平板</a> <span class="ml10 mr10">/</span> <a href="">一体机</a> </div> <div class="sub-row"> <span class="bold mr10">电脑配件：</span> <a href="">显示器</a> <span class="ml10 mr10">/</span> <a href="">CPU</a> <span class="ml10 mr10">/</span> <a href="">主板</a> <span class="ml10 mr10">/</span> <a href="">硬盘</a> <span class="ml10 mr10">/</span> <a href="">电源</a> <span class="ml10 mr10">/</span> <a href="">显卡</a> <span class="ml10 mr10">/</span> <a href="">其他配件</a> </div> <div class="sub-row"> <span class="bold mr10">游戏设备：</span> <a href="">游戏机</a> <span class="ml10 mr10">/</span> <a href="">耳机</a> <span class="ml10 mr10">/</span> <a href="">游戏软件</a> </div> <div class="sub-row"> <span class="bold mr10">网络产品：</span> <a href="">路由器</a> <span class="ml10 mr10">/</span> <a href="">网络机顶盒</a> <span class="ml10 mr10">/</span> <a href="">交换机</a> <span class="ml10 mr10">/</span> <a href="">存储卡</a> <span class="ml10 mr10">/</span> <a href="">网卡</a> </div> <div class="sub-row"> <span class="bold mr10">外部产品：</span> <a href="">鼠标</a> <span class="ml10 mr10">/</span> <a href="">键盘</a> <span class="ml10 mr10">/</span> <a href="">U盘</a> <span class="ml10 mr10">/</span> <a href="">移动硬盘</a> <span class="ml10 mr10">/</span> <a href="">鼠标垫</a> <span class="ml10 mr10">/</span> <a href="">电脑清洁</a> </div> </div> <!-- 家用电器 --> <div class="inner-box"> <div class="title">家用电器</div> <div class="sub-row"> <span class="bold mr10">电视：</span> <a href="">国产品牌</a> <span class="ml10 mr10">/</span> <a href="">韩国品牌</a> <span class="ml10 mr10">/</span> <a href="">欧美品牌</a> </div> <div class="sub-row"> <span class="bold mr10">空调：</span> <a href="">显示器</a> <span class="ml10 mr10">/</span> <a href="">柜式</a> <span class="ml10 mr10">/</span> <a href="">中央</a> <span class="ml10 mr10">/</span> <a href="">壁挂式</a> </div> <div class="sub-row"> <span class="bold mr10">冰箱：</span> <a href="">多门</a> <span class="ml10 mr10">/</span> <a href="">对开门</a> <span class="ml10 mr10">/</span> <a href="">三门</a> <span class="ml10 mr10">/</span> <a href="">双门</a> </div> <div class="sub-row"> <span class="bold mr10">洗衣机：</span> <a href="">滚筒式洗衣机</a> <span class="ml10 mr10">/</span> <a href="">迷你洗衣机</a> <span class="ml10 mr10">/</span> <a href="">洗烘一体机</a> </div> <div class="sub-row"> <span class="bold mr10">厨房电器：</span> <a href="">油烟机</a> <span class="ml10 mr10">/</span> <a href="">洗碗机</a> <span class="ml10 mr10">/</span> <a href="">燃气灶</a> </div> </div> <!-- 家具 --> <div class="inner-box"> <div class="title">家具</div> <div class="sub-row"> <span class="bold mr10">家纺：</span> <a href="">被子</a> <span class="ml10 mr10">/</span> <a href="">枕头</a> <span class="ml10 mr10">/</span> <a href="">四件套</a> <span class="ml10 mr10">/</span> <a href="">床垫</a> </div> <div class="sub-row"> <span class="bold mr10">灯具：</span> <a href="">台灯</a> <span class="ml10 mr10">/</span> <a href="">顶灯</a> <span class="ml10 mr10">/</span> <a href="">节能灯</a> <span class="ml10 mr10">/</span> <a href="">应急灯</a> </div> <div class="sub-row"> <span class="bold mr10">厨具：</span> <a href="">烹饪锅具</a> <span class="ml10 mr10">/</span> <a href="">餐具</a> <span class="ml10 mr10">/</span> <a href="">菜板刀具</a> </div> <div class="sub-row"> <span class="bold mr10">家装：</span> <a href="">地毯</a> <span class="ml10 mr10">/</span> <a href="">沙发垫套</a> <span class="ml10 mr10">/</span> <a href="">装饰字画</a> <span class="ml10 mr10">/</span> <a href="">照片墙</a> <span class="ml10 mr10">/</span> <a href="">窗帘</a> </div> <div class="sub-row"> <span class="bold mr10">生活日用：</span> <a href="">收纳用品</a> <span class="ml10 mr10">/</span> <a href="">浴室用品</a> <span class="ml10 mr10">/</span> <a href="">雨伞雨衣</a> </div> </div> </div> <!-- 图片轮播 --> <div class="banner" id="banner"> <a href=""> <div class="banner-slide slide1 slide-active"></div> </a> <a href=""> <div class="banner-slide slide2"></div> </a> <a href=""> <div class="banner-slide slide3"></div> </a> </div> <!-- 上一张、下一张按钮 --> <a href="javascript:void(0)" class="button prev" id="prev" ></a> <a href="javascript:void(0)" class="button next" id="next" ></a> <!-- 圆点导航 --> <div class="dots" id="dots"> <span class="active"></span> <span></span> <span></span> </div> </div> <script src="js/index.js"></script> </body> </html>
*{
margin: 0;
padding: 0;
}
@font-face {
font-family: 'iconfont';
src: url('iconfont.eot');
src: url('iconfont.eot?#iefix') format('embedded-opentype'),
url('iconfont.woff') format('woff'),
url('iconfont.ttf') format('truetype'),
url('iconfont.svg#iconfont') format('svg');
}
.iconfont{
font-family:"iconfont" !important;
font-size:16px;font-style:normal;
}
ul{
list-style: none;
}
a:link,a:visited{
text-decoration: none;
color: #333;
}
body{
font-family: "微软雅黑";
color: #14191e;
}
.main{
width: 1200px;
height: 460px;
margin: 30px auto;
overflow: hidden;
position: relative;
}
.banner{
width: 1200px;
height: 460px;
overflow: hidden;
position: relative;
}
.banner-slide{
width: 1200px;
height: 460px;
background-repeat: no-repeat;
position: absolute;
display: none;
}
.slide-active{
display: block;
}
.slide1{
background-image: url(../img/bg1.jpg);
}
.slide2{
background-image: url(../img/bg2.jpg);
}
.slide3{
background-image: url(../img/bg3.jpg);
}
.button{
width: 40px;
height: 80px;
position: absolute;
left: 244px;
top: 50%;
margin-top: -40px;
background: url(../img/arrow.png) no-repeat center center;
}
.button:hover{
background-color: #333;
opacity: 0.4;
/*下面这个针对一些低版本ie浏览器之类兼容的*/
/*filter: alpha(opasity=40);*/
}
.prev{
transform: rotate(180deg);
}
.next{
left: auto;
right: 0;
}
.dots{
position: absolute;
right: 10px;
bottom: 24px;
}
.dots span{
display: inline-block;
width: 12px;
height: 12px;
border-radius: 50%;
/*rgba可以同时设置透明度*/
background-color: rgba(7,17,27,0.6);
box-shadow: 0 0 1px 2px rgba(255,255,255,0.8) inset;
margin-right: 8px;
cursor: pointer;
}
.dots .active{
background-color: #fff;
box-shadow: 0 0 1px 2px rgba(7,17,27,0.6) inset;
}
/*导航菜单*/
.menu-box{
width: 244px;
height: 460px;
position: absolute;
left: 0;
top: 0;
background-color: rgba(7,17,27,0.5);
z-index: 1;
}
.menu-content{
width: 244px;
height: 454px;
position: absolute;
left: 0;
top: 0;
z-index: 2;
padding-top: 6px;
}
.menu-item{
height: 64px;
line-height: 64px;
padding-left: 24px;
position: relative;
}
.menu-item a:link,.menu-item a:visited{
color: #fff;
}
.menu-item a{
display: block;
border-bottom: 1px solid rgba(255,255,255,0.2);
height: 63px;
padding: 0 8px;
}
.menu-item i{
position: absolute;
right: 32px;
top: 0px;
font-weight: normal;
color: rgba(255,255,255,0.5);
}
.sub-menu{
width: 730px;
height: 458px;
border: 1px solid #d9ddde;
background-color: #fff;
position: absolute;
left: 244px;
top: 0;
z-index: 999;
background: url(../img/fe.png) no-repeat center center;
}
.inner-box{
width: 652px;
margin-left: 40px;
overflow: hidden;
position: absolute;
display: none;
}
.title{
color: #f01414;
line-height: 16px;
margin:30px 0;
font-weight: bolder;
}
.sub-row{
margin-bottom: 25px;
}
.bold{
font-weight: bold;
}
.mr10{
margin-right: 10px;
}
.ml10{
margin-left: 10px;
}
.hide{
display: none;
}// 封装一个代替getElementById()的方法
function byId(id){
return typeof(id) ==="string"?document.getElementById(id):id;
}
var index =0,
timer = null,
pics = byId('banner').getElementsByTagName('div'),
dots = byId('dots').getElementsByTagName('span'),
len = pics.length;
var menu = byId('menu-content'),
menuItems = menu.getElementsByClassName('menu-item'),
subMenu=byId('sub-menu'),
innerBoxs=subMenu.getElementsByClassName('inner-box');
// 切换图片
function changeImg(){
// 遍历banner下div和dots下的span，将div隐藏，将span清楚类
for(var i=0;i<len;i++){
pics[i].style.display="none";
dots[i].className='';
}
// 根据索引找到当前div和span，将其显示或激活
pics[index].style.display="block";
dots[index].className='active';
}
function slideImg(){
var main=byId("main");
// 滑过清除定时器，离开继续
main.onmouseover = function(){
// 滑过清除定时器
if(timer) clearInterval(timer);
};
main.onmouseout = function(){
// 离开启动定时器
timer = setInterval(function(){
index++;
if(index>=len){
index=0;
}
changeImg();
},2000);
};
// 自动在main上出发鼠标离开的事件
main.onmouseout();
//遍历所有点击，绑定点击事件，点击圆点切换图片
for(var d=0;d<len;d++){
// 将圆点的索引设id属性，后面可可以根据id找到索引
dots[d].id=d;
// function引用外部可变变量是以变量的最后一个值作为参数
dots[d].onclick=function(){
index=this.id;
changeImg();
}
}
// 实现上一张，下一张按钮功能
byId('next').onclick=function(){
index++;
if(index>=len) index=0;
changeImg();
};
byId('prev').onclick=function(){
index--;
if(index<0) index=len-1;
changeImg();
};
// 遍历主菜单，且绑定事件
for(var i=0;i<menuItems.length;i++){
// 给所有的menu-item添加一个data-index属性作为索引
menuItems[i].setAttribute('data-index',i);
menuItems[i].onmouseover=function(){
var idx=this.getAttribute('data-index');
for(var m=0;m<menuItems.length;m++){
innerBoxs[m].style.display='none';
}
subMenu.className='sub-menu';
innerBoxs[idx].style.display='block';
}
}
menu.onmouseout=function(){
subMenu.className='sub-menu hide';
}
subMenu.onmouseover=function(){
subMenu.calssName="sub-menu";
// console.log("aaa");
// 加一个输出测试事件绑定成功，但是子菜单不显示
}
subMenu.onmouseout=function(){
subMenu.calssName="sub-menu hide";
}
}
slideImg();老师，你看我js代码那里，我测试了好久，其他功能都没问题，就是主菜单划到子菜单是不能显示。麻烦老师帮我看看什么问题吧。
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2回答
同学截图中红框圈出来的部分写错了，className拼错了，修改后就可以了。
如果用IE浏览器是出不来的。请问同学用的是什么浏览器呢？建议同学用谷歌浏览器。祝学习愉快。
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