前端小demo——tab切换

2018-06-24 02:13:09来源：未知阅读 ()

<!DOCTYPE html>
<html>
<head lang="en">
    <meta charset="UTF-8">
    <title></title>
    <style>
        * {
            margin: 0;
            padding: 0;
        }
        ul {
            list-style: none;
        }
        #div {
            width: 640px;
            height: 480px;
            border: 2px solid #cccccc;
            margin: 100px auto;

        }
        #top {
            height: 45px;
        }
        #top span {
            display: inline-block;
            width: 154px;
            background-color: lightskyblue;
            line-height: 45px;
            text-align: center;
            cursor: pointer;
        }
        #top span.choose {
            background-color: deepskyblue;

        }
        #content li {
            display: none;
        }
        #content li.choose {
            display: block;
        }
        body {
            background-image: url("img/bg.gif");
        }
    </style>
</head>
<body>
<div id="div">
    <div id="top">
        <span class="choose">晋助</span>
        <span>半藏</span>
        <span>桂</span>
        <span>银时</span>
    </div>

    <div id="content">
        <ul>
            <li class="choose"><img src="img/yh1.jpg" alt=""/></li>
            <li><img src="img/yh2.jpg" alt=""/></li>
            <li><img src="img/yh3.jpg" alt=""/></li>
            <li><img src="img/yh4.jpg" alt=""/></li>
        </ul>
    </div>
</div>
<script>

    //获取列表中的元素
    var spanO=document.getElementsByTagName("span");
    var liO=document.getElementsByTagName("li");
    //循环遍历每个span标签
    for(var i=0;i<spanO.length;i++) {
        //添加自定义属性，索引
        spanO[i].setAttribute("index",i);
        //注册点击事件，添加事件处理函数
        spanO[i].onclick=function() {
            //循环遍历每个span
            for(var j=0;j<spanO.length;j++) {
                //移除span的样式
                spanO[j].removeAttribute("class");
            }
            //给每个span赋予新样式
            this.className="choose";
            //循环遍历每个li
            for(var k=0;k<liO.length;k++) {
                //移除li的样式
                liO[k].removeAttribute("class");
            }
            liO[this.getAttribute("index")].className="choose";
        }
    }
</script>


</body>
</html>