js跨瀏覽器操作xml

function parseXml(xml){
    var xmldom = null;
    if(typeof DOMParser!="undefined"){
       xmldom = (new DOMParser()).parseFromString(xml,"text/xml");
       var errors = xmldom.getElementsByTagName("parsererror");
       if(errors.length){
            throw new Error("XML parse error:"+errors[0].textContent);
    }else if(typeof ActiveXObject!="undefined"){
        xmldom = createDocument();
        xmldom.loadXML(xml);
        if(xmldom.parseError!=0){
            throw new Error("XML parse error:"+xmldom.parseError.reason);
        }
    }else{
        throw new Error("No XML parser available.");
    }
    return xmldom;
}

註意:

使用上面函數時,應註意捕獲異常。

如下:

var xmldom = null;
try{
  xmldom = parseXml("");
}catch(ex){
  alert(ex.message);
}

序列化XML

function serializeXml(xmldom){
  if(typeof XMLSerializer!="undefined"){
     return (new XMLSerializer()).serializeToString(xmldom);
  }else if(typeof xmldom.xml!="undefined"){
     return xmldom.xml;
  }else{
     throw new Error("Could not serialize XML DOM.");
  }
}

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