js unlimited folding menu lite version_navigation menu

<meta charset="utf-8"> <title>无限级折叠菜单 1.01 JS版</title> <meta name="keywords" content="hj1227 原创无限级折叠菜单 1.01js版"> <meta name="description" content="hj1227 原创无限级折叠菜单 1.01js版"> <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 { width:260px; margin:50px auto; padding:10px; border:#EEE 1px solid; } #menu h3 { font-size:12px; } #menu ul { background:url("http://demo.jb51.net/js/2011/caidan/ul-bg.gif") repeat-y 5px 0px; overflow:hidden; } #menu ul li { padding:5px 0 2px 15px; background:url("http://demo.jb51.net/js/2011/caidan/tree-ul-li.gif") no-repeat 5px -32px; } #menu ul li ul {display:none;} #menu ul li em { cursor:pointer; display:inline-block; width:15px; float:left; height:15px; margin-left:-14px; background:url("http://demo.jb51.net/js/2011/caidan/tree-ul-li.gif") no-repeat -32px 2px; } #menu ul li em.off { background-position: -17px -18px; } #menu ul li#end { background-color:#FFF; } #menu ul.off { display:block; }--> </style> <div id="menu"> <h3>Infinite folding menu 1.0.1 JS version </h3> <ul> <li> <em></em><a href="javascript:void(0);">Menu_1_1</a> <ul> <li> <em></em><a href="javascript:void(0);">Menu_2_1</a> <ul> <li> <em></em><a href="javascript:void(0);">Menu_3_1</a> <ul> <li> <em></em><a href="javascript:void(0);">Menu_4_1</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_4_2</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_3_2</a> <ul> <li> <em></em><a href="javascript:void(0);">Menu_4_1</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_4_2</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> </ul> </li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_2_2</a> <ul> <li> <em></em><a href="javascript:void(0);">Menu_3_1</a> <ul> <li> <em></em><a href="javascript:void(0);">Menu_4_1</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_4_2</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_3_2</a> <ul> <li> <em></em><a href="javascript:void(0);">Menu_4_1</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_4_2</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> </ul> </li> </ul> </li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_1_2</a> <ul> <li> <em></em><a href="javascript:void(0);">Menu_2_1</a> <ul> <li> <em></em><a href="javascript:void(0);">Menu_3_1</a> <ul> <li> <em></em><a href="javascript:void(0);">Menu_4_1</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_4_2</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_3_2</a> <ul> <li> <em></em><a href="javascript:void(0);">Menu_4_1</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_4_2</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> </ul> </li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_2_2</a> <ul> <li> <em></em><a href="javascript:void(0);">Menu_3_1</a> <ul> <li> <em></em><a href="javascript:void(0);">Menu_4_1</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_4_2</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_3_2</a> <ul> <li> <em></em><a href="javascript:void(0);">Menu_4_1</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> <li id="end"> <em></em><a href="javascript:void(0);">Menu_4_2</a> <ul> <li><a href="javascript:void(0);">Menu_5_1</a></li> <li id="end"><a href="javascript:void(0);">Menu_5_2</a></li> </ul> </li> </ul> </li> </ul> </li> </ul> </li> </ul> </div>
[Ctrl A select all Note: If you need to introduce external Js, you need to refresh to execute

]
Online demo http://demo.jb51.net/js/2011/caidan/index.htm