javascript鼠标滑过显示二级菜单特效

时间:2020-05-15 行者杰客人气:0

本文实例为大家分享了javascript鼠标滑过显示二级菜单效果，供大家参考，具体内容如下

1. 关键代码：使用 switch 或 if 判断语句，改变对应的二级菜单显示方式为 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. 主导航绑定事件

3. 二级菜单

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

4. 完整代码

<!DOCTYPE html>
<html lang="en">
<head>
 <meta charset="UTF-8">
 <title>水平导航-二级菜单</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)">首页</a></li>
   <li><a href="#" onmouseover="selectTabMenu(72)">关于协会</a></li>
   <li><a href="#" onmouseover="selectTabMenu(73)">协会动态</a></li>
   <li><a href="#" onmouseover="selectTabMenu(74)">协会活动</a></li>
   <li><a href="#" onmouseover="selectTabMenu(75)">会员</a></li>
   <li><a href="#" onmouseover="selectTabMenu(76)">资源空间</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>协会简介</li>
   <li>组织机构</li>
   <li>协会章程</li>
  </ul>
  <ul id="TabMenuCon73" class="TabMenuCon">
   <li>协会新闻</li>
   <li>活动预告</li>
   <li>求职招聘</li>
  </ul>
  <ul id="TabMenuCon74" class="TabMenuCon">
   <li>义务维修月</li>
   <li>平面设计活动</li>
   <li>程序设计活动</li>
   <li>户外拓展</li>
  </ul>
  <ul id="TabMenuCon75" class="TabMenuCon">
   <li>会员登录</li>
   <li>会员注册</li>
   <li>缴纳会费</li>
   <li>会员信息管理</li>
   <li>修改密码</li>
  </ul>
  <ul id="TabMenuCon76" class="TabMenuCon">
   <li>PS教程</li>
   <li>前端设计</li>
   <li>Flash教程</li>
  </ul>
 </div>
</body>
</html>

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