javascript鼠标滑过显示二级菜单特效

网络编程 2024/11/15 佚名

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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>

以上就是本文的全部内容，希望对大家的学习有所帮助。

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