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javascript鼠標滑過顯示二級菜單特效
編輯:關於JavaScript     

本文實例為大家分享了javascript鼠標滑過顯示二級菜單效果,供大家參考,具體內容如下

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為 block 或 none

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

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

3. 二級菜單

<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

<!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>會員登錄</li>
   <li>會員注冊</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>

以上就是本文的全部內容,希望對大家的學習有所幫助。

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