* {  

    margin: 0px;  

    padding: 0px;  

}  

body {  

    width: 600px;  

    margin: 0 auto;  

    background-color: silver;  

}  

#contanier {  

    background-color: yellow;  

    width: 600px;height: 400px;  

}  

#tabNavi {  

    width: 600px;height: 30px;  

    background-color: #00bfff;  

    text-decoration: none;  

    list-style-type: none;  

}  

#tabNavi li {  

    float: left;  

    margin-right: 7px;  

     background-color: #008b8b;  

    color: white;  

    cursor: pointer;  

    width: 60px;  

    height: 28px;  

    line-height: 30px;  

    text-align: center;  

}  

#content {  

    width: 600px;height: 370px;  

    background-color: white;  

}

index.html如下：

復(fù)制代碼代碼如下:

<!DOCTYPE html>  

<html xmlns="http://www.w3.org/1999/xhtml">  

<head>  

<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>  

    <title>js實現(xiàn)tab菜單動態(tài)切換效果</title>  

    <link href="css/index.css" rel="stylesheet" />  

    <script type="text/javascript">  

        function gel(id) {  

            return document.getElementById(id);  

        }  

        var arr = [  

            { "title": "新聞", "content": "這是新聞頻道" },  

            { "title": "財經(jīng)", "content": "這是財經(jīng)頻道" },  

            { "title": "娛樂", "content": "這是娛樂頻道" },  

            { "title": "體育", "content": "這是體育頻道" },  

            { "title": "汽車", "content": "這是汽車頻道" },  

            { "title": "視頻", "content": "這是視頻頻道" },  

            { "title": "生活", "content": "這是生活頻道" }  

        ];  

        window.onload = function() {  

            for (var i = 0; i < arr.length; i++) {  

                var liNew = document.createElement("li");  

                liNew.innerHTML = arr[i].title;  

                gel("tabNavi").appendChild(liNew);  

                //在這些li上面都綁定點擊事件，就需要給他們每一個賦一個屬性(最好是id)  

                liNew.setAttribute("id", i);  

                liNew.onclick = function () {  

                   var navs = gel("tabNavi").childNodes;  

                    //清除所有顏色  

                   for (var j = 0; j < navs.length; j++) {  

                       if (navs[j].nodeType == 1) {  

                           navs[j].style.backgroundColor ="#008b8b";  

                       }  

                    }  

                    this.style.backgroundColor = "red";  

                    gel("content").innerHTML = arr[this.id].content;  

                };  

            }  

        };  

    </script>  

</head>  

<body>  

    <div id="contanier">  

        <ul id="tabNavi"></ul>  

        <div id="content" class="content"></div>  

    </div>  

</body>  

</html>