java script 读取xml (转贴)

首先：xml文件（tree.xml）内容如下：

<?xml version="1.0" encoding="gb2312"?> 
<treeview> 
<tree id="p1"> 
<text>山东省</text> 
<target>_blank</target> 
<title>省份</title> 
<link></link> 
<tree id="p1-1"> 
<text>威海市</text> 
<target>_blank</target> 
<title>城市</title> 
<link></link> 
</tree> 
<tree id="p1-2"> 
<text>烟台市</text> 
<target>_blank</target> 
<title>城市</title> 
<link></link> 
<node id="p1-2-1"> 
<text>长夼村</text> 
<target>_blank</target> 
<title>乡镇</title> 
<link>http://www.baidu.com/</link> 
</node> 
</tree> 
<node id="p1-3"> 
<text>富镇</text> 
<target>_blank</target> 
<title>乡镇</title> 
<link>http://www.baidu.com/</link> 
</node> 
</tree> 

<tree id="p2"> 
<text>河北省</text> 
<target>_blank</target> 
<title>省份</title> 
<link></link> 
<tree id="p2-1"> 
<text>泊头市</text> 
<target>_blank</target> 
<title>城市</title> 
<link></link> 
<node id="p2-1-1"> 
<text>郊河</text> 
<target>_blank</target> 
<title>乡镇</title> 
<link>http://www.baidu.com/</link> 
</node> 
</tree> 
<tree id="p2-2"> 
<text>石家庄</text> 
<target>_blank</target> 
<title>城市</title> 
<link></link> 
</tree> 
</tree> 

<tree id="p3"> 
<text>浙江省</text> 
<target>_blank</target> 
<title>省份</title> 
<link></link> 
<tree id="p3-1"> 
<text>杭州市</text> 
<target>_blank</target> 
<title>城市</title> 
<link></link> 
<node id="p3-1-1"> 
<text>某镇</text> 
<target>_blank</target> 
<title>乡镇</title> 
<link>http://www.baidu.com/</link> 
</node> 
</tree> 
<tree id="p3-2"> 
<text>温州市</text> 
<target>_blank</target> 
<title>城市</title> 
<link></link> 
<node id="p3-2-1"> 
<text>某镇</text> 
<target>_blank</target> 
<title>乡镇</title> 
<link>http://www.baidu.com/</link> 
</node> 
</tree> 
</tree> 
</treeview> 

//////////////////////////////////////////////////////
然后：javascript函数实现：(文件名称：tree.htm）

<script Language="JavaScript"> 
var HTML = ""; 
var space = ""; 
var blank = "  "; 
function getSubject() 
{ 
var xmlDoc; 

if(window.ActiveXObject) 
{ 
//获得操作的xml文件的对象 
xmlDoc = new ActiveXObject('Microsoft.XMLDOM'); 
xmlDoc.async = false; 
xmlDoc.load("tree.xml"); 
if(xmlDoc == null) 
{ 
alert('您的浏览器不支持xml文件读取,于是本页面禁止您的操作,推荐使用IE5.0以上可以解决此问题!'); 
window.location.href='/Index.aspx'; 
return; 
} 
} 
//解析xml文件，判断是否出错 
if(xmlDoc.parseError.errorCode != 0) 
{ 
alert(xmlDoc.parseError.reason); 
return; 
} 
//获得根接点 
var nodes = xmlDoc.documentElement.childNodes; 
//得到根接点下共有子接点个数，并循环 
for(var i=0; i<nodes.length; i++) 
{ 
//如果接点名为 tree 
if(nodes(i).nodeName == "tree") 
{ 
readTree(nodes(i)); 
} 
//如果接点名为 node 
else if(nodes(i).nodeName == "node") 
{ 
readNode(nodes(i)); 
} 
} 
//删除对象 
delete(xmlDoc); 
//显示HTML 
window.show.innerHTML = HTML; 
return; 
} 
//读Tree节点 
function readTree(cI) 
{ 
var nodes = cI.childNodes; 
var menuHTML = space; 
menuHTML += blank; 
//得到超级链接 
menuHTML += "<a href='"; 
//如果该节点的连接属性不为空，则连接 
if(cI.selectNodes("link")(0).text != "") 
{ 
menuHTML += cI.selectNodes("link")(0).text; 
} 
//否则为空链接 
else 
{ 
menuHTML += "#"; 
} 
//目标 
if(cI.selectNodes("target")(0).text != "") 
{ 
menuHTML += " target='"+cI.selectNodes("target")(0).text; 
menuHTML += "'"; 
} 
//点击菜单事件，调用divshow(vid)函数 
menuHTML += " onclick=javascript:divshow('"+cI.getAttribute("id")+"');"; 
//得到节点标题 
menuHTML += " title='"; 
menuHTML += cI.selectNodes("title")(0).text; 
//结束 
menuHTML += "'>"; 
//得到节点的正文 
menuHTML += cI.selectNodes("text")(0).text; 
menuHTML += "</a><br>\n"; 
//将menuHTML设置添加到HTML字符串 
HTML += menuHTML; 
//得到该节点的属性值<span 
HTML += "<div id='"+cI.getAttribute("id")+"' style='display:none'>\n"; 
for(var i=0; i<nodes.length; i++) 
{ 
var tempImg = ""; 
tempImg += blank; 
if(nodes(i).nodeName == "tree") 
{ 
space += tempImg; 
readTree(nodes(i)); 
space = ""; 
} 
else if(nodes(i).nodeName == "node") 
{ 
space += tempImg; 
readNode(nodes(i)); 
} 
} 
HTML += "</div>\n"; 
return; 
} 
//读Node节点 
function readNode(cI) 
{ 
var nodeHTML = space; 
nodeHTML += blank; 
//设置超级链接 
nodeHTML += "<a href='"; 
//得到连接地址 
nodeHTML += cI.selectNodes("link")(0).text; 
//目标 
if(cI.selectNodes("target")(0).text != "") 
nodeHTML += "' target='"+cI.selectNodes("target")(0).text; 
//得到节点标题 
nodeHTML += "' title='"; 
nodeHTML += cI.selectNodes("title")(0).text; 
//结束 
nodeHTML += "'>"; 
//得到节点的正文 
nodeHTML += cI.selectNodes("text")(0).text; 
nodeHTML += "</a><br>\n"; 
HTML += nodeHTML; 
//HTML += "<div id='"+cI.getAttribute("id")+"'>"; 
space = ""; 
return; 
} 
//操作对象的显示还是隐藏效果 
function divshow(vid) 
{ 
if(document.all[vid].style.display == "none") 
{ 
document.all[vid].style.display = "block"; 
} 
else 
{ 
document.all[vid].style.display = "none"; 
} 
return; 
} 
</script> 

<html> 
<head> 
<meta http-equiv="Content-Type" content="text/html; charset=gb2312"> 
<title>JS_XML</title> 

<style type="text/css"> 
<!-- 
body 
{ 
margin-left: 0px; 
margin-top: 0px; 
margin-right: 0px; 
margin-bottom: 0px; 
font-size: 9pt; 
} 
A 
{ 
text-decoration:none; 
font-family: "宋体"; 
font-size: 9pt; 
COLOR:#000000; 
} 
--> 
</style> 

</head> 
<body bgcolor="#EEEEEE" leftmargin="0" topmargin="0"> 
<div id=show></div> 
</body> 
<script> 
getSubject() 
</script> 
</html> 

运行，要在同一个路径下！