XML中定位字段修改、讀取[原創]

function saveFile(fileName,xmlStr)//保存文本文件
{
   var fso, tf,f;
   fso = new ActiveXObject("Scripting.FileSystemObject");
   try
 {
    f = fso.GetFile(fileName);
 f.attributes =0;
 }
 catch(e){}
   tf = fso.CreateTextFile(fileName, true);

   tf.Write(xmlStr);
   tf.Close();
}

function createDom(xmlStr)
{
　 var dom = new ActiveXObject("Msxml2.DOMDocument.3.0");
　 //創建DOM實例，並裝載文件
 dom.async="false";
　 dom.loadXML(xmlStr);
 return dom;
}

function setValueByName(pTagName,pKeyName,pValue)
{
 var xmlDom=createDom(openFile(GetXmlFilePath()));
 var pNodeList=xmlDom.getElementsByTagName(pTagName);
 var pchildNode=pNodeList.item(0).firstChild;
 for (j=1;;j++)
  {
   if (pchildNode.nodeName==pKeyName)
   {
    pchildNode.text=pValue;
    break;
   }
   pchildNode=pchildNode.nextSibling;
  }
 var xmlStr=xmlDom.xml;
 xmlStr=xmlStr.replace("<?xml version=/"1.0/"?>","<?xml version=/"1.0/" encoding=/"gb2312/"?>")
 saveFile(GetXmlFilePath(),xmlStr);
}
function getValueByName(pTagName,pKeyName)
{
 var xmlDom=createDom(openFile(GetXmlFilePath()));
 var pNodeList=xmlDom.getElementsByTagName(pTagName);
 var pchildNode=pNodeList.item(0).firstChild;
 var pValue=100;
    for (j=1;;j++)
  {
   if (pchildNode.nodeName==pKeyName)
   {
    pValue=pchildNode.text;
    return pValue;
    break;
   }
   pchildNode=pchildNode.nextSibling;
  }
}