JavaScript实现Tab标签页切换功能详解

<!DOCTYPE html>
<html lang="en">
<head>
  <meta charset="UTF-8">
  <title>tab</title>
  <style>
    *{margin:0; padding:0; list-style:none;}
    .box{
      width: 1000px;
      overflow: hidden;
      margin:100px auto 0px;
    }
    #title{
      line-height: 40px;
      background-color: rgb(247,247,247);
      font-size: 16px;
      font-weight: bold;
      color: rgb(102,102,102);
      overflow: hidden;
    }
    #title span{
      float: left;
      width: 166px;
      text-align: center;
    }
    #title span:hover{
      /*color: black;*/
      cursor: pointer;
    }
    #content{
      margin-top: 20px;
    }
    #content li{
      width: 1050px;
      overflow: hidden;
      display: none;
      background-color: rgb(247,247,247);
    }
    #content li div{
      width: 156px;
      margin-right: 14px;
      float: left;
      text-align: center;
    }
    #content li div a{
      font-size: 14px;
      color: black;
      line-height: 14px;
    /*  float: left;*/
    display: inline-block;
      margin-top: 10px;
    }
    #content li a:hover{
      color: #B70606;
    }
      #content li div span{
        font-size: 16px;
        line-height: 16px;
        /*float: left;*/
        display: block;
        color: rgb(102,102,102);
        margin-top: 10px;
      }
    #content img{
      float: left;
      width: 155px;
      height: 250px;
    }
    #title .select{
      background-color: rgb(10,167,112);
      color: white;
    }
    #content .show{
      display: block;
    }
  </style>
</head>
<body>
    <div class="box">
      <p id="title">
        <span class="select">帅哥</span>
        <span>美女</span>
        <span>宠物</span>
        <span>影视</span>
        <span>英雄联盟</span>
        <span>音乐</span>
      </p>
      <ul id="content">
        <li class="show">
          <div><img src="images/shuaige1.jpg" alt="帅哥1"><a href="#">杰森·史坦森</a><span>狂拽炫酷屌炸天</span></div>
          <div><img src="images/shuaige2.jpg" alt="帅哥2"><a href="#">杰森·史坦森</a><span>狂拽炫酷屌炸天</span></div>
          <div><img src="images/shuaige3.jpg" alt="帅哥3"><a href="#">汤姆·克鲁斯</a><span>高端大气上档次</span></div>
          <div><img src="images/shuaige4.jpg" alt="帅哥4"><a href="#">汤姆·克鲁斯</a><span>高端大气上档次</span></div>
          <div><img src="images/shuaige5.jpg" alt="帅哥5"><a href="#">卷福</a><span>低调奢华有内涵</span></div>
          <div><img src="images/shuaige6.jpg" alt="帅哥6"><a href="#">卷福</a><span>低调奢华有内涵</span></div>
        </li>
        <li>
          <div><img src="images/meinv1.jpg" alt="美女1"><a href="#">美女</a><span>外猛内柔女汉子</span></div>
          <div><img src="images/meinv2.jpg" alt="美女2"><a href="#">美女</a><span>外猛内柔女汉子</span></div>
          <div><img src="images/meinv3.jpg" alt="美女3"><a href="#">美女</a><span>卖萌嘟嘴剪刀手</span></div>
          <div><img src="images/meinv4.jpg" alt="美女4"><a href="#">美女</a><span>卖萌嘟嘴剪刀手</span></div>
          <div><img src="images/meinv5.jpg" alt="美女5"><a href="#">美女</a><span>时尚亮丽小清新</span></div>
          <div><img src="images/meinv6.jpg" alt="美女6"><a href="#">美女</a><span>时尚亮丽小清新</span></div>
        </li>
        <li>
          <div><img src="images/chongwu1.jpg" alt="宠物1"><a href="#">宠物</a><span>每只666块</span></div>
          <div><img src="images/chongwu2.jpeg" alt="宠物2"><a href="#">宠物</a><span>每只666块</span></div>
          <div><img src="images/chongwu3.jpg" alt="宠物3"><a href="#">宠物</a><span>每只666块</span></div>
          <div><img src="images/chongwu4.jpg" alt="宠物4"><a href="#">宠物</a><span>每只666块</span></div>
          <div><img src="images/chongwu5.jpg" alt="宠物5"><a href="#">宠物</a><span>每只666块</span></div>
          <div><img src="images/chongwu6.jpg" alt="宠物6"><a href="#">宠物</a><span>每只666块</span></div>
        </li>
        <li>
          <div><img src="images/yingshi1.jpg" alt="影视1"><a href="#">哈利波特系列</a><span>经典中的经典</span></div>
          <div><img src="images/yingshi2.jpg" alt="影视2"><a href="#">三傻大闹宝莱坞</a><span>看到泪崩</span></div>
          <div><img src="images/yingshi3.jpg" alt="影视3"><a href="#">变形金刚系列</a><span>过瘾过瘾过瘾</span></div>
          <div><img src="images/yingshi4.jpg" alt="影视4"><a href="#">千与千寻</a><span>梦中的小萝莉那么清新</span></div>
          <div><img src="images/yingshi5.jpeg" alt="影视5"><a href="#">龙猫</a><span>我的龙猫啊啊啊</span></div>
          <div><img src="images/yingshi6.jpg" alt="影视6"><a href="#">阿甘正传</a><span>阿甘还是那个阿甘</span></div>
        </li>
        <li>
          <div><img src="images/lol1.jpg" alt="lol1"><a href="#">寒冰射手</a><span>蛮王他媳妇</span></div>
          <div><img src="images/lol2.jpg" alt="lol2"><a href="#">黑暗之女</a><span>小萝莉一枚</span></div>
          <div><img src="images/lol3.jpg" alt="lol3"><a href="#">探险家</a><span>游戏中我最帅</span></div>
          <div><img src="images/lol4.jpg" alt="lol4"><a href="#">人马</a><span>上单大野全能</span></div>
          <div><img src="images/lol5.jpg" alt="lol5"><a href="#">提莫提百万</a><span>每天死亡百万次。。</span></div>
          <div><img src="images/lol6.jpg" alt="lol6"><a href="#">狼人</a><span>别给我放大</span></div>
        </li>
        <li>
          待开发。。。
        </li>
      </ul>
    </div>
    <script>
      var title=document.getElementById('title');
      var content=document.getElementById('content');
      var spans=title.getElementsByTagName('span');
      var lis=content.getElementsByTagName('li');
      for (var i = 0; i < spans.length; i++) {
        spans[i].index=i;
          spans[i].onclick=function(){
            for (var j = 0; j < spans.length; j++) {
              spans[j].className='';
              lis[j].className='';
            }
              this.className='select';
              lis[this.index].className='show';
          }
      }
    </script>
</body>
</html>