javascript 操作xml

<script language=JavaScript>
function createXML()
{
var doc = new ActiveXObject("Msxml2.DOMDocument"); //ie5.5+,CreateObject("Microsoft.XMLDOM")


//加载文档
doc.load("C:\Tomcat5\webapps\CBF\b.xml");
doc.async = false;

//创建文件头
var p = doc.createProcessingInstruction("xml","version='1.0'  encoding='gb2312'");

     //添加文件头
     doc.appendChild(p);

//用于直接加载时获得根接点
//var root = doc.documentElement;

//两种方式创建根接点
//    var root = doc.createElement("students");
     var root = doc.createNode(1,"students","");

     //创建子接点
     var n = doc.createNode(1,"ttyp","");

         //指定子接点文本
         //n.text = " this is a test";
     
     //创建孙接点
     var o = doc.createElement("sex");
         o.text = "男";    //指定其文本

     //创建属性
     var r = doc.createAttribute("id");
         r.value="test";

         //添加属性
         n.setAttributeNode(r);

     //创建第二个属性    
     var r1 = doc.createAttribute("class");
         r1.value="tt";
         
         //添加属性
         n.setAttributeNode(r1);

         //删除第二个属性
         n.removeAttribute("class");

         //添加孙接点
         n.appendChild(o);

         //添加文本接点
         n.appendChild(doc.createTextNode("this is a text node."));

         //添加注释
         n.appendChild(doc.createComment("this is a comment\n"));
     
         //添加子接点
         root.appendChild(n);
     
     //复制接点
     var m = n.cloneNode(true);

         root.appendChild(m);
         
         //删除接点
         root.removeChild(root.childNodes(0));

     //创建数据段
     var c = doc.createCDATASection("this is a cdata");
         c.text = "hi,cdata";
         //添加数据段
         root.appendChild(c);
     
     //添加根接点
     doc.appendChild(root);

     //查找接点
     var a = doc.getElementsByTagName("ttyp");
     //var a = doc.selectNodes("//ttyp");

     //显示改接点的属性
     for(var i= 0;i<a.length;i++)
      {
         alert(a[i].xml);
         for(var j=0;j<a[i].attributes.length;j++)
          {
             alert(a[i].attributes[j].name);
         }
     }

     //修改节点,利用XPATH定位节点
     var b = doc.selectSingleNode("//ttyp/sex");
     b.text = "女";

     alert(doc.xml);

     //XML保存（需要在服务端，客户端用FSO）
     doc.save();
     
     //查看根接点XML
     if(n)
      {
         alert(n.ownerDocument.xml);
     }
}     

</script>