javascript鼠标滑过显示二级菜单特效

前端技术 2023/09/09 JavaScript

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

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

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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