Detailed explanation of sample code for using javascript to manipulate xml methods and techniques

Try to use all operations and attributes in the article to demonstrate

<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=&#39;1.0&#39; encoding=&#39;gb2312&#39;"); 
//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>

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