javascript读取xml

 

data.xml
<?xml version="1.0" encoding="gb2312"?>
<employees>
     <employee name="Billgates">
          <job>Programmer</job>
          <salary>32768</salary>
     </employee>
     <employee name="王涛">
          <job>无业游民</job>
          <salary>70000</salary>
     </employee>
     <employee name="Big 中华">
          <job>哈尔滨CEO</job>
          <salary>100000</salary>
     </employee>
</employees>

<script language="javascript">
//类的构造，传入xml文档和需要处理的标签名称
function DataSet(xmlFile, tagLabel) {
  var xmldoc;
  if(window.ActiveXObject){
    xmldoc=new ActiveXObject("Microsoft.XMLDOM");
  }else if(document.implementation&&document.implementation.createDocument){
    xmldoc=document.implementation.createDocument("","doc",null);
  }
  xmldoc.async = false;
  xmldoc.load(xmlFile);
  this.rootObj = xmldoc.getElementsByTagName(tagLabel)
 
  this.getCount = getCount;
  this.getData = getData;
  this.getAttribute = getAttribute;
  this.getNodeAttribute=getNodeAttribute;
}
function getCount(){
  return this.rootObj.length
}
function getData(index, tagName){
  if (index >= this.count) return "index overflow"
  var node = this.rootObj[index]
  var str = node.getElementsByTagName(tagName)[0].firstChild.data
  return str
}
function getAttribute(index, tagName) {
  if (index >= this.count) return "index overflow"
  var node = this.rootObj[index]
  var str = node.getAttribute(tagName)
  return str
}
function getNodeAttribute(index,node,tagName){
  if(index>=this.rootObj[index].childNodes.length)return "index overflow";
  var str=this.rootObj[index].childNodes[node].getAttribute(tagName);
  return str;
}
var set=new DataSet("data.xml","employee");
alert(set.getCount());
alert(set.getAttribute(2,"name"));
alert(set.getData(1,"job"));
</script>