发布于 2017-03-05 01:18:09 | 162 次阅读 | 评论: 0 | 来源: 网友投递
这里有新鲜出炉的Javascript教程，程序狗速度看过来！
JavaScript客户端脚本语言
Javascript 是一种由Netscape的LiveScript发展而来的原型化继承的基于对象的动态类型的区分大小写的客户端脚本语言，主要目的是为了解决服务器端语言，比如Perl，遗留的速度问题，为客户提供更流畅的浏览效果。
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>
以上就是本文的全部内容，希望对大家的学习有所帮助。