javascript 特效實現(3)—— 鼠標滑過顯示二級菜單效果

時間 2019-11-12

標籤 javascript 特效實現鼠標滑過顯示二級菜單效果欄目 JavaScript 简体版

原文原文鏈接

1. 關鍵代碼：使用 switch 或 if 判斷語句，改變對應的二級菜單顯示方式爲 block 或 nonejavascript

function selectTabMenu(i){
　　switch(i){
　　　　case 71:     
　　　　　　document.getElementById("TabMenuCon71").style.display="block";
          document.getElementById("TabMenuCon72").style.display="none";
          document.getElementById("TabMenuCon73").style.display="none";
          document.getElementById("TabMenuCon74").style.display="none";
          document.getElementById("TabMenuCon75").style.display="none";
          document.getElementById("TabMenuCon76").style.display="none";
          break;
　　　　 　 ...
　　}
}

2. 主導航綁定事件 css

<ul class="nav">
　　<li><a href="#" onmouseover="selectTabMenu(71)">首頁</a></li>

3. 二級菜單html

<ul id="TabMenuCon71" class="TabMenuCon">
　　<li><a href="#">公告</a></li>
　　<li><<a href="#">信息</a></li>
</ul>

4. 完整代碼前端

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>水平導航-二級菜單</title>
    <style type="text/css">
        *{
            padding:0px;
            margin: 0px;
        }
        .navBar{
            height: 30px;
            background-color: #2B383E;
            text-align: center;
        }
        ul{
            list-style: none;
        }
        .nav li{
            float: left;
        
        }
        .nav li a{
            display: block;
            padding: 0 20px;
            height: 30px;
            line-height: 30px;
            text-decoration: none;
            color: #fff;
        }
        .nav li a:hover{
            background-color: #fff;
            color: #4DB6E7
        }
        .TabMenuCon{
            clear: both;
            display: none;
        }
        .TabMenuCon li{
            display: inline-block;
        }
    </style>

    <script type="text/javascript">
        function selectTabMenu(i){
            switch(i){
               case 71:     
                document.getElementById("TabMenuCon71").style.display="block";
                document.getElementById("TabMenuCon72").style.display="none";
                document.getElementById("TabMenuCon73").style.display="none";
                document.getElementById("TabMenuCon74").style.display="none";
                document.getElementById("TabMenuCon75").style.display="none";
                document.getElementById("TabMenuCon76").style.display="none";
                break;
            case 72:
                document.getElementById("TabMenuCon71").style.display="none";
                document.getElementById("TabMenuCon72").style.display="block";
                document.getElementById("TabMenuCon73").style.display="none";
                document.getElementById("TabMenuCon74").style.display="none";
                document.getElementById("TabMenuCon75").style.display="none";
                document.getElementById("TabMenuCon76").style.display="none";
                break;
            case 73:    
                document.getElementById("TabMenuCon71").style.display="none";
                document.getElementById("TabMenuCon72").style.display="none";
                document.getElementById("TabMenuCon73").style.display="block";
                document.getElementById("TabMenuCon74").style.display="none";
                document.getElementById("TabMenuCon75").style.display="none";
                document.getElementById("TabMenuCon76").style.display="none";
                break;
            case 74:
                document.getElementById("TabMenuCon71").style.display="none";
                document.getElementById("TabMenuCon72").style.display="none";
                document.getElementById("TabMenuCon73").style.display="none";
                document.getElementById("TabMenuCon74").style.display="block";
                document.getElementById("TabMenuCon75").style.display="none";
                document.getElementById("TabMenuCon76").style.display="none";
                break; 
            case 75:
                document.getElementById("TabMenuCon71").style.display="none";
                document.getElementById("TabMenuCon72").style.display="none";
                document.getElementById("TabMenuCon73").style.display="none";
                document.getElementById("TabMenuCon74").style.display="none";
                document.getElementById("TabMenuCon75").style.display="block";
                document.getElementById("TabMenuCon76").style.display="none";
                break; 
                case 76:
                document.getElementById("TabMenuCon71").style.display="none";
                document.getElementById("TabMenuCon72").style.display="none";
                document.getElementById("TabMenuCon73").style.display="none";
                document.getElementById("TabMenuCon74").style.display="none";
                document.getElementById("TabMenuCon75").style.display="none";
                document.getElementById("TabMenuCon76").style.display="block";
                break; 
           }
        }
    </script>
</head>
<body>
    <div class="navBar">
        <ul class="nav">
            <li><a href="#" onmouseover="selectTabMenu(71)">首頁</a></li>
            <li><a href="#" onmouseover="selectTabMenu(72)">關於協會</a></li>
            <li><a href="#" onmouseover="selectTabMenu(73)">協會動態</a></li>
            <li><a href="#" onmouseover="selectTabMenu(74)">協會活動</a></li>
            <li><a href="#" onmouseover="selectTabMenu(75)">會員</a></li>
            <li><a href="#" onmouseover="selectTabMenu(76)">資源空間</a></li>
        </ul>
        
    </div>
    <div id="TabMenuCon">
        <ul id="TabMenuCon71" class="TabMenuCon">
            <li><a href="#">公告</a></li>
            <li><<a href="#">信息</a></li>
        </ul>
        <ul id="TabMenuCon72" class="TabMenuCon">
            <li>協會簡介</li>
            <li>組織機構</li>
            <li>協會章程</li>
        </ul>
        <ul id="TabMenuCon73" class="TabMenuCon">
            <li>協會新聞</li>
            <li>活動預告</li>
            <li>求職招聘</li>
        </ul>
        <ul id="TabMenuCon74" class="TabMenuCon">
            <li>義務維修月</li>
            <li>平面設計活動</li>
            <li>程序設計活動</li>
            <li>戶外拓展</li>
        </ul>
        <ul id="TabMenuCon75" class="TabMenuCon">
            <li>會員登陸</li>
            <li>會員註冊</li>
            <li>繳納會費</li>
            <li>會員信息管理</li>
            <li>修改密碼</li>
        </ul>
        <ul id="TabMenuCon76" class="TabMenuCon">
            <li>PS教程</li>
            <li>前端設計</li>
            <li>Flash教程</li>
        </ul>
    </div>
</body>
</html>

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