这是一款js折叠导航菜单特效，可支持无限折叠，每个菜单项都带有收缩和展开按钮，实用的折叠菜单特效。
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312" />
<meta name="keywords" content="武鸣人网站,武鸣信息网,武鸣本地网,武鸣信息资源平台,减肥,健身,励志,励志语录,js特效,网页特效,www.wuming.ren">
<meta name="description" content="欢迎来到武鸣人信息资源平台，各种信息免费发布，资源共享合作共赢，分享互联网流行的励志语录经典短句，减肥健身健康小常识及打卡记录，收集各种js特效代码。">
<title>js实现菜单栏无限折叠特效_武鸣人</title>
<style>
<!--
body,ul,h3 {margin:0px; padding:0px;}
li {list-style-type:none;}
body{
font-size:12px;
color:#333;
font-family: Simsun;
line-height:15px;
}
a{text-decoration:none;color:#004285;border:none;}
a:hover{text-decoration:none;color:#C33;}
#menu_wuming_ren {
width:260px;
margin:50px auto;
padding:10px;
border:#EEE 1px solid;
}
#menu_wuming_ren h3 {
font-size:12px;
}
#menu_wuming_ren ul {
background:url("/img/20240412_www_wuming_ren_1.gif") repeat-y 5px 0px; overflow:hidden;
}
#menu_wuming_ren ul li {
padding:5px 0 2px 15px;
background:url("/img/20240412_www_wuming_ren_2.gif") no-repeat 5px -32px;
}
#menu_wuming_ren ul li ul {display:none;}
#menu_wuming_ren ul li em {
cursor:pointer;
display:inline-block;
width:15px;
float:left;
height:15px;
margin-left:-14px;
background:url("/img/20240412_www_wuming_ren_2.gif") no-repeat -32px 2px;
}
#menu_wuming_ren ul li em.off {
background-position: -17px -18px;
}
#menu_wuming_ren ul li#end_wuming_ren {
background-color:#FFF;
}
#menu_wuming_ren ul.off {
display:block;
}
-->
</style>
</head>
<body>
<a href="https://www.wuming.ren">武鸣人</a>，各种信息资源免费发布，分享励志语录经典短句，减肥健身常识，各种js特效代码。网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)<hr>
<!--欢迎来到武鸣人信息资源平台，各种信息免费发布，资源共享合作共赢，分享互联网流行的励志语录经典短句，减肥健身健康小常识及打卡记录，收集各种js特效代码。-->
<script type="text/javascript" src="https://www.wuming.ren/ad/tc.js"></script>
<script type="text/javascript" src="https://www.wuming.ren/ad/a.js"></script>
<div id="menu_wuming_ren">
<h3>js无限级折叠菜单 wuming.ren</h3>
<ul>
<li><em></em><a href='javascript:void(0);'>武鸣人_1_1</a>
<ul>
<li><em></em><a href='javascript:void(0);'>菜单_2_1</a>
<ul>
<li><em></em><a href='javascript:void(0);'>菜单_3_1</a>
<ul>
<li><em></em><a href='javascript:void(0);'>菜单_4_1</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>菜单_4_2</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>菜单_3_2</a>
<ul>
<li><em></em><a href='javascript:void(0);'>菜单_4_1</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>菜单_4_2</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>菜单_2_2</a>
<ul>
<li><em></em><a href='javascript:void(0);'>菜单_3_1</a>
<ul>
<li><em></em><a href='javascript:void(0);'>菜单_4_1</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>菜单_4_2</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>菜单_3_2</a>
<ul>
<li><em></em><a href='javascript:void(0);'>菜单_4_1</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>菜单_4_2</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>武鸣人_1_2</a>
<ul>
<li><em></em><a href='javascript:void(0);'>菜单_2_1</a>
<ul>
<li><em></em><a href='javascript:void(0);'>菜单_3_1</a>
<ul>
<li><em></em><a href='javascript:void(0);'>菜单_4_1</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>菜单_4_2</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>菜单_3_2</a>
<ul>
<li><em></em><a href='javascript:void(0);'>菜单_4_1</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>菜单_4_2</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>菜单_2_2</a>
<ul>
<li><em></em><a href='javascript:void(0);'>菜单_3_1</a>
<ul>
<li><em></em><a href='javascript:void(0);'>菜单_4_1</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>菜单_4_2</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>菜单_3_2</a>
<ul>
<li><em></em><a href='javascript:void(0);'>菜单_4_1</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
<li id='end_wuming_ren'><em></em><a href='javascript:void(0);'>菜单_4_2</a>
<ul>
<li><a href='javascript:void(0);'>菜单_5_1</a></li>
<li id='end_wuming_ren'><a href='javascript:void(0);'>菜单_5_2</a></li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</li>
</ul>
</div>
<script type="text/javascript">
(function(e){
for(var _obj=document.getElementById(e.id).getElementsByTagName(e.tag),i=-1,em;em=_obj[++i];){
em.onclick = function(){ //onmouseover
var ul = this.nextSibling;
if(!ul){return false;}
ul = ul.nextSibling; if(!ul){return false;}
if(e.tag != 'a'){ ul = ul.nextSibling; if(!ul){return false;} } //a 标签控制 隐藏或删除该行
for(var _li=this.parentNode.parentNode.childNodes,n=-1,li;li=_li[++n];){
if(li.tagName=="LI"){
for(var _ul=li.childNodes,t=-1,$ul;$ul=_ul[++t];){
switch($ul.tagName){
case "UL":
$ul.className = $ul!=ul?"" : ul.className?"":"off";
break;
case "EM":
$ul.className = $ul!=this?"" : this.className?"":"off";
break;
}
}
}
}
}
}//武鸣人网站https://www.wuming.ren 网站很好记住，wuming.ren(武鸣拼音.ren域名后缀)
})({id:'menu_wuming_ren',tag:'em'});
</script>
</body>
</html>本文来自武鸣人网站，转载请注明出处