a {text-decoration:none;} a,a:visited {color:#000;background:inherit;} body {margin:0;padding:20px;font:12px tahoma,宋体,sans-serif;} dt {font-size:22px;font-weight:bold;margin:0 0 0 15px;} dd {margin:0 0 0 15px;} h4 {margin:0;padding:0;font-size:18px;text-align:center;} p {margin:0;padding:0 0 0 18px;} p a,p a:visited {color:#00f;background:inherit;} /*CNLTreeMenu Start*/ .CNLTreeMenu img.s {cursor:pointer;vertical-align:middle;} .CNLTreeMenu ul {padding:0;} .CNLTreeMenu li {list-style:none;padding:0;} .Closed ul {display:none;} .Child img.s {background:none;cursor:default;} #CNLTreeMenu1 ul {margin:0 0 0 17px;} #CNLTreeMenu1 img.s {width:20px;height:15px;} #CNLTreeMenu1 .Opened img.s {background:url(skin1/opened.gif) no-repeat 0 0;} #CNLTreeMenu1 .Closed img.s {background:url(skin1/closed.gif) no-repeat 0 0;} #CNLTreeMenu1 .Child img.s {background:url(skin1/child.gif) no-repeat 3px 5px;} #CNLTreeMenu2 ul {margin:0 0 0 17px;} #CNLTreeMenu2 img.s {width:17px;height:15px;} #CNLTreeMenu2 .Opened img.s {background:url(skin2/opened.gif) no-repeat 4px 6px;} #CNLTreeMenu2 .Closed img.s {background:url(skin2/closed.gif) no-repeat 3px 6px;} #CNLTreeMenu2 .Child img.s {background:url(skin2/child.gif) no-repeat 3px 5px;} #CNLTreeMenu3 ul {margin:0 0 0 17px;} #CNLTreeMenu3 img.s {width:34px;height:18px;} #CNLTreeMenu3 .Opened img.s {background:url(skin3/opened.gif) no-repeat 0 1px;} #CNLTreeMenu3 .Closed img.s {background:url(skin3/closed.gif) no-repeat 0 1px;} #CNLTreeMenu3 .Child img.s {background:url(skin3/child.gif) no-repeat 13px 2px;} /*CNLTreeMenu End*/ /*Temp CSS for View Demo*/ #CNLTreeMenu1,#CNLTreeMenu2,#CNLTreeMenu3 {float:left;width:249px;border:1px solid #99BEEF;background:#D2E4FC;color:inherit;margin:3px;padding:3px;} #CNLTreeMenu1,#CNLTreeMenu2 {padding-bottom:15px;} .ViewCode { clear:both; border:1px solid #FFB900;background:#FFFFCC;color:inherit;margin:3px;padding:3px; } .ViewCode h6 {color:#00f;}
JavaScript代码：
function Ob(o){ var o=document.getElementById(o)?document.getElementById(o):o; return o; } function Hd(o) { Ob(o).style.display="none"; } function Sw(o) { Ob(o).style.display=""; } function ExCls(o,a,b,n){ var o=Ob(o); for(i=0;i<n;i++) {o=o.parentNode;} o.className=o.className==a?b:a; } function CNLTreeMenu(id,TagName0) { this.id=id; this.TagName0=TagName0==""?"li":TagName0; this.AllNodes = Ob(this.id).getElementsByTagName(TagName0); this.InitCss = function (ClassName0,ClassName1,ClassName2,ImgUrl) { this.ClassName0=ClassName0; this.ClassName1=ClassName1; this.ClassName2=ClassName2; this.ImgUrl=ImgUrl || "css/s.gif"; this.ImgBlankA ="<img src=https://www.jb51.net/article/\""+this.ImgUrl+"https://www.jb51.net/article/\" class=https://www.jb51.net/article/\"s\" onclick=https://www.jb51.net/article/\"ExCls(this,'"+ClassName0+"','"+ClassName1+"',1);\" alt=https://www.jb51.net/article/\"展开/折叠\" />"; this.ImgBlankB ="<img src=https://www.jb51.net/article/\""+this.ImgUrl+"https://www.jb51.net/article/\" class=https://www.jb51.net/article/\"s\" />"; for (i=0;i<this.AllNodes.length;i++ ) { this.AllNodes[i].className==""?this.AllNodes[i].className=ClassName1:""; this.AllNodes[i].innerHTML=(this.AllNodes[i].className==ClassName2?this.ImgBlankB:this.ImgBlankA)+this.AllNodes[i].innerHTML; } } this.SetNodes = function (n) { var sClsName=n==0?this.ClassName0:this.ClassName1; for (i=0;i<this.AllNodes.length;i++ ) { this.AllNodes[i].className==this.ClassName2?"":this.AllNodes[i].className=sClsName; } } }
HTML页面：
<!--CNLTreeMenu Start:--> <div> <h4>CNL Tree Menu1</h4> <p><a href="#">全部展开</a><a href="#">全部折叠</a></p> <ul> <li><a href="https://www.jb51.net">JB51.Net</a> <ul> <li><a href="#1">技术区</a> <ul> <li><a href="#">网页技术</a> <ul> <li><a href="#">JavaScript</a></li><!--Child Node--> <li><a href="#">HTML/XHTML/CSS</a></li> <li><a href="#">Ajax</a></li> <li><a href="#">网页制作工具</a></li> <li><a href="#">设计/图形</a></li> <li><a href="#">Flash/多媒体</a></li> <li><a href="#">VML/Web3D</a></li> </ul></li><!--Sub Node 3--> <li><a href="#">Web编程</a> <ul> <li><a href="#">Java</a></li><!--Child Node--> <li><a href="#">.Net</a></li> <li><a href="#">ASP/VBScript</a></li> <li><a href="#">PHP</a></li> <li><a href="#">Perl/Python</a></li> <li><a href="#">Web综合/开源</a></li> </ul></li><!--Sub Node 3--> <li><a href="#">数据库</a> <ul> <li><a href="#">Access/SQLServer</a></li><!--Child Node--> <li><a href="#">MySQL/PostgreSQL</a></li> <li><a href="#">Oracle/DB2/Sybase</a></li> </ul></li><!--Sub Node 3--> <li><a href="#">服务器</a> <ul> <li><a href="#">Windows/IIS</a></li><!--Child Node--> <li><a href="#">Unix/Linux/Apache</a></li> <li><a href="#">应用服务器</a></li> </ul></li><!--Sub Node 3--> </ul></li><!--Sub Node 2--> <li><a href="#1">二级目录</a> <ul> <li><a href="#">三级目录</a> <ul> <li><a href="#">四级目录</a> <ul> <li><a href="#">五级目录</a> <ul> <li><a href="#"></a> <ul> <li><a href="#">第n级目录</a> <ul> <li><a href="#">叶结点1</a></li><!--Child Node--> <li><a href="#">叶结点2</a></li> <li><a href="#">叶结点3</a></li> </ul></li><!--Sub Node n --> </ul></li><!--Sub Node 6 --> </ul></li><!--Sub Node 5 --> </ul></li><!--Sub Node 4--> </ul></li><!--Sub Node 3--> </ul></li><!--Sub Node 2--> <li><a href="#1">二级目录</a> <ul> <li><a href="#">三级目录</a> <ul> <li><a href="#">四级目录</a> <ul> <li><a href="#">五级目录</a> <ul> <li><a href="#"></a> <ul> <li><a href="#">第n级目录</a> <ul> <li><a href="#">叶结点1</a></li><!--Child Node--> <li><a href="#">叶结点2</a></li> <li><a href="#">叶结点3</a></li> </ul></li><!--Sub Node n --> </ul></li><!--Sub Node 6 --> </ul></li><!--Sub Node 5 --> </ul></li><!--Sub Node 4--> </ul></li><!--Sub Node 3--> </ul></li><!--Sub Node 2--> </ul></li><!--Sub Node 1 --> </ul> </div><!-- CNLTreeMenu --> <!--CNLTreeMenu1 End!-->