用javascript操作xml

文中尽量用上所有的操作和属性，以做示范

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

//加载文档//doc.load("b.xml");

//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>