XML+ JS创建树形菜单

发布时间：2006-03-10 19:13:21　来源：友佳学院网友评论 0 条

简单说明:

思路:
从数据岛menuXML中读取数据,从树的根节点开始分析树,
利用 hasChildNodes() [方法:是否含有子节点 ] 判断当前
节点是否有子节点,如果有子节点继续向下分析 childNodes
[对象:子节点对象集合] ,否则返回当前分析结果(树结点对象)。

主要的函数:
createTree(thisn /*树结点*/ , sd/*树深度*/)
运行代码框
<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN"><HTML><HEAD><TITLE> DSTree </TITLE><META NAME="Author" CONTENT="sTarsjz@hotmail.com" ><style>body,td{font:12px verdana}#treeBox{background-color:#fffffa;}#treeBox .ec{margin:0 5 0 5;}#treeBox .hasItems{font-weight:bold;height:20px;padding:3 6 0 6;margin:2px;cursor:hand;color:#555555;border:1px solid #fffffa;}#treeBox .Items{height:20px;padding:3 6 0 6;margin:1px;cursor:hand;color:#555555;border:1px solid #fffffa;}</style><base href="http://vip.5d.cn/star/dstree/" /><script>//code by star 20003-4-7var HC = "color:#990000;border:1px solid #cccccc";var SC = "background-color:#efefef;border:1px solid #cccccc;color:#000000;";var IO = null;function initTree(){ var rootn = document.all.menuXML.documentElement; var sd = 0; document.onselectstart = function(){return false;} document.all.treeBox.appendChild(createTree(rootn,sd));}function createTree(thisn,sd){ var nodeObj = document.createElement("span"); var upobj = document.createElement("span"); with(upobj){ style.marginLeft = sd*10; className = thisn.hasChildNodes()?"hasItems":"Items"; innerHTML = "<img src=expand.gif class=ec>" + thisn.getAttribute("text") +""; onmousedown = function(){ if(event.button != 1) return; if(this.getAttribute("cn")){ this.setAttribute("open",!this.getAttribute("open")); this.cn.style.display = this.getAttribute("open")?"inline":"none"; this.all.tags("img")[0].src = this.getAttribute("open")?"expand.gif":"contract.gif"; } if(IO){ IO.runtimeStyle.cssText = ""; IO.setAttribute("selected",false); } IO = this; this.setAttribute("selected",true); this.runtimeStyle.cssText = SC; } onmouseover = function(){ if(this.getAttribute("selected"))return; this.runtimeStyle.cssText = HC; } onmouseout = function(){ if(this.getAttribute("selected"))return; this.runtimeStyle.cssText = ""; } oncontextmenu = contextMenuHandle; onclick = clickHandle; } if(thisn.getAttribute("treeId") != null){ upobj.setAttribute("treeId",thisn.getAttribute("treeId")); } if(thisn.getAttribute("href") != null){ upobj.setAttribute("href",thisn.getAttribute("href")); } if(thisn.getAttribute("target") != null){ upobj.setAttribute("target",thisn.getAttribute("target")); } nodeObj.appendChild(upobj); nodeObj.insertAdjacentHTML("beforeEnd","<br>") if(thisn.hasChildNodes()){ var i; var nodes = thisn.childNodes; var cn = document.createElement("span"); upobj.setAttribute("cn",cn); if(thisn.getAttribute("open") != null){ upobj.setAttribute("open",(thisn.getAttribute("open")=="true")); upobj.getAttribute("cn").style.display = upobj.getAttribute("open")?"inline":"none"; if( !upobj.getAttribute("open"))upobj.all.tags("img")[0].src ="contract.gif"; } for(i=0;i<nodes.length;cn.appendChild(createTree(nodes[i++],sd+1))); nodeObj.appendChild(cn); } else{ upobj.all.tags("img")[0].src ="endnode.gif"; } return nodeObj;}window.onload = initTree;</script><script>function clickHandle(){ // your code here }function contextMenuHandle(){ event.returnValue = false; var treeId = this.getAttribute("treeId"); // your code here}</script></HEAD><BODY><xml id=menuXML><?xml version="1.0" encoding="GB2312"?><DSTreeRoot text="根节点" open="true" href="http://" treeId="123"> <DSTree text="技术论坛" open="false" treeId=""> <DSTree text="5DMedia" open="false" href="http://" target="box" treeId="12"> <DSTree text="网页编码" href="http://" target="box" treeId="4353" /> <DSTree text="手绘" href="http://" target="box" treeId="543543" /> <DSTree text="灌水" href="http://" target="box" treeId="543543" /> </DSTree> <DSTree text="BlueIdea" open="false" href="http://" target="box" treeId="213"> <DSTree text="DreamWeaver & JS" href="http://" target="box" treeId="4353" /> <DSTree text="FlashActionScript" href="http://" target="box" treeId="543543" /> </DSTree> <DSTree text="CSDN" open="false" href="http://" target="box" treeId="432"> <DSTree text="JS" href="http://" target="box" treeId="4353" /> <DSTree text="XML" href="http://" target="box" treeId="543543" /> </DSTree> </DSTree> <DSTree text="资源站点" open="false" treeId=""> <DSTree text="素材屋" href="http://" target="box" treeId="12" /> <DSTree text="桌面城市" open="false" href="http://" target="box" treeId="213"> <DSTree text="壁纸" href="http://" target="box" treeId="4353" /> <DSTree text="字体" href="http://" target="box" treeId="543543" /> </DSTree> <DSTree text="MSDN" open="false" href="http://" target="box" treeId="432"> <DSTree text="DHTML" href="http://" target="box" treeId="4353" /> <DSTree text="HTC" href="http://" target="box" treeId="543543" /> <DSTree text="XML" href="" target="box" treeId="2312" /> </DSTree> </DSTree></DSTreeRoot></xml><table style="position:absolute;left:100;top:100;"><tr><td id=treeBox style="width:400px;height:200px;border:1px solid #cccccc;padding:5 3 3 5;" valign=top></td></tr><tr><td style="font:10px verdana;color:#999999" align=right>by <font color=#660000>sTar</font><br> 2003-4-8</td></tr></table></BODY></HTML>
[Ctrl+A 全部选择提示：你可先修改部分代码，再按运行]

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