javascript读写xml的问题

<?xml version="1.0" encoding="GBK"?>
<root>
<line lineCode="1" lineName="line1" speed="50km/h">
<road lineInCode="4" roadCode ="62" roadName ="xianfenglu" sectionLong ="1000" opCycle="240" splitCoordPhase="2" phaseDiff="10" >
<stages number="3">
 <stage stageCode="1" stageGreen="0" minGreen="0" maxGreen="0" yellow="0" redClear="0" phases="0"></stage>
 <stage stageCode="2" stageGreen="50" minGreen="0" maxGreen="0" yellow="0" redClear="0" phases="0"></stage>
 </stages>
</road><road lineInCode="3" roadCode ="63" roadName ="huaihailu" sectionLong ="2000" opCycle="240" splitCoordPhase="2" phaseDiff="20" >
<stages number="5">
<stage stageCode="1" stageGreen="0" minGreen="0" maxGreen="0" yellow="0" redClear="0" phases="0"></stage>
 <stage stageCode="2" stageGreen="0" minGreen="0" maxGreen="0" yellow="0" redClear="0" phases="0"></stage>

</stages>
</road><road lineInCode="2" roadCode ="64" roadName ="zhejianglu" sectionLong ="3000" opCycle="240" splitCoordPhase="3" phaseDiff="30" >
<stages number="4">
<stage stageCode="1" stageGreen="0" minGreen="0" maxGreen="0" yellow="0" redClear="0" phases="0"></stage>
 <stage stageCode="2" stageGreen="0" minGreen="0" maxGreen="0" yellow="0" redClear="0" phases="0"></stage>

</stages>
</road>
</line>
</root>我是新手，请问这样的xml文件有这样的写法吗？如果是读这样的文件，该怎么读，谁能给个详细的读每个属性值的例子？谢谢了

解决方案 »

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读取节点属性使用getAttribute方法例如 alert(xmlObj.getElementsByTagName("line")[0].getAttribute("roadCode"));
IE下好像有直接加载xml的js api。ff不知道有没有
不过可以用通用的方法来做，用XMLHttpRequest来读，读到后获取 request.responseXml即可。具体可以搜索XMLHttpRequest, ajax
http://topic.csdn.net/u/20091124/14/7bf199fd-7a3a-46bc-b134-d44cad53c039.html?seed=641911037&r=61411346#r_61411346
看看高率的程序，绝对的原创，1,客户端的JavaScript不能写服务器上的XML文件，因为这会引起危险的安全问题；
2，客户端的JavaScript读取服务器上的XML文件，首先假设在服务器上存在：
（1）文件名VisitUser.xml
（2）XML文件结构：
--------------------------------------------------------------------
<?xml version="1.0" encoding="gb2312"?>
<visiter>
<area areaid="shenzhen">
<areaname>shenzhen </areaname>
<user userid="001">
<name>xiaoM </name>
<sex>boy </sex> <
jobtitle>web </jobtitle>
<userip>192.168.1.1 </userip>
<addtime>2009-02-17 15:30:20 </addtime>
</user>
<user userid="002">
<name>BBC </name>
<sex>boy </sex>
<jobtitle>web2.0 </jobtitle>
<userip>192.168.1.151 </userip>
<addtime>2009-02-19 15:30:20 </addtime>
</user>
</area>
<area areaid="guangzhou">
<areaname>guangzhou </areaname>
<user userid="003"> <name>Arian </name>
<sex>boy </sex>
<jobtitle>WEB2.0 </jobtitle>
<userip>192.168.1.151 </userip>
<addtime>2009-2-17 10:57:09 </addtime>
</user>
</area>
</visiter>
--------------------------------------------------------------------
HTML文件（index.htm）为： <!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=gb2312">
<title>TEST</title>
</head>
<style type="text/css">
body,td,input{font-family:verdana,Arial; font-size:12px; font-weight:normal;}
span{font-family:"Arial black",verdana; font-size:16px; font-weight:bold;}
a:link{font-family:verdana,Arial; font-size:12px; font-weight:normal; color:#FF6600; text-decoration:none;}
a:visited{font-family:verdana,Arial; font-size:12px; font-weight:normal; color:#FF6600; text-decoration:none;}
a:hover{font-family:verdana,Arial; font-size:12px; font-weight:normal; color:#CC0000; text-decoration:none;}
</style>
<body>

created: 2009-04-15; 
athor:shenzhenNBA

<script language="javascript" type="text/javascript">
function GetXMLData(XMLFileName){
 var xmlDoc;
 var xmlFile;
 var ieFlag="ie";
 xmlFile=XMLFileName;
 if (window.ActiveXObject)
 {
 var activeXNameList=new Array("MSXML2.DOMDocument.6.0","MSXML2.DOMDocument.5.0","MSXML2.DOMDocument.4.0","MSXML2.DOMDocument.3.0","MSXML2.DOMDocument","Microsoft.XMLDOM","MSXML.DOMDocument");
 for(var h=0;h<activeXNameList.length;h++)
 {
 try{
 xmlDoc=new ActiveXObject(activeXNameList[h]);
 }catch(e){
 continue;
 }
 if(xmlDoc)
 {break; }
 }

 xmlDoc.async=false;
 xmlDoc.load(xmlFile);
 ieFlag="ie";
 }else if(document.implementation && document.implementation.createDocument){
 xmlDoc=document.implementation.createDocument("","",null);
 xmlDoc.async=false;
 xmlDoc.load(xmlFile);
 ieFlag="other";
 }else{
 alert("Can not create XML DOM Document object in your IE.\nMaybe use Microsoft or FireFox or Netscape IE will better.");
 } var strResult="";
 var subNode="";
 var subNode2="";
 var attrib="";
 if(ieFlag=="ie")
 {
 var arealist=xmlDoc.documentElement.getElementsByTagName("area");
 for (var i=0; i< arealist.length; i++)
 {
 try{
 strResult=strResult + ""+arealist[i].childNodes[0].text+", ";
 }catch(e){ }
 try{
 var userlist=arealist[i].getElementsByTagName("user");
 for(var t=0;t<userlist.length;t++)
 {
 attrib+=""+userlist[t].getAttribute("userid")+", ";
 subNode+=""+userlist[t].firstChild.text+", ";
 subNode2+=""+userlist[t].childNodes[2].text+", ";
 }
 }catch(e){ }
 }
 } if(ieFlag=="other")
 {
 var arealist=xmlDoc.getElementsByTagName("area");
 for(var j=0;j<arealist.length;j++)
 {
 try{
 strResult =strResult+""+ arealist[j].getElementsByTagName("areaname")[0].firstChild.nodeValue+", ";
 }catch(e){}
 try{
 var userlist=arealist[j].getElementsByTagName("user");
 for(var k=0;k<userlist.length;k++)
 {
 attrib=attrib+""+userlist[k].getAttribute("userid")+", ";
 subNode=subNode+""+userlist[k].getElementsByTagName("name")[0].childNodes[0].nodeValue+", ";
 subNode2=subNode2+""+userlist[k].getElementsByTagName("jobtitle")[0].firstChild.nodeValue+", ";
 }
 }catch(e){}
 }
 }
 document.write("Exist area : "+strResult);
 document.write(" AttributeValue(userid): "+attrib);
 document.write(" subNodeValue(Name) : "+subNode);
 document.write(" subNodeValue2(Jobtitle) : "+subNode2);
}
GetXMLData("VisitUser.xml");
</script>
</body>
</html>
XML文件和HTML文件放在服务器的同一个目录测试即可，