XML DOM 遍历Xml文档

1.xml文档内容：

<?xml version="1.0" encoding="utf-8" ?>
<bookstore>

  <book category="children">
    <title lang="en">Harry Potter</title>
    <author>J K. Rowling</author>
    <year>2005</year>
    <price>29.99</price>
  </book>

  <book category="cooking">
    <title lang="en">Everyday Italian</title>
    <author>Giada De Laurentiis</author>
    <year>2005</year>
    <price>30.00</price>
  </book>

  <book category="web">
    <title lang="en">Learning XML</title>
    <author>Erik T. Ray</author>
    <year>2003</year>
    <price>39.95</price>
  </book>

  <book category="web">
    <title lang="en">XQuery Kick Start</title>
    <author>James McGovern</author>
    <author>Per Bothner</author>
    <author>Kurt Cagle</author>
    <author>James Linn</author>
    <author>Vaidyanathan Nagarajan</author>
    <year>2003</year>
    <price>49.99</price>
  </book>

</bookstore>

2.封装解析xml文档函数到loadxmldoc.js文件中

function loadXMLDoc(dname) 
{
try //Internet Explorer
  {
  xmlDoc=new ActiveXObject("Microsoft.XMLDOM");//创建空的微软xml文档对象
  }
catch(e)
  {
  try //Firefox, Mozilla, Opera, etc.
    {
    xmlDoc=document.implementation.createDocument("","",null);//其他浏览器通过解析器创建xml文档对象
    }
  catch(e) {alert(e.message)}
  }
try 
  {
  xmlDoc.async=false;//关闭异步加载，确保文档加载完之前解析器不会继续执行脚本
  xmlDoc.load(dname);//加载文档
  return(xmlDoc);//返回xml文档对象
  }
catch(e) {alert(e.message)}
return(null);
}

3.遍历xml文档下所有节点

<script type="text/javascript" src="Scripts/loadxmldoc.js">//引入loadxmldoc.js文件
</script>

<script type="text/javascript">
    xmlDoc = loadXMLDoc("books.xml");//创建文档对象
    x = xmlDoc.documentElement.childNodes;//获取根节点下的子节点
    for (i = 0; i < x.length; i++) {
        if (1==x[i].nodeType){//是否为元素节点
            document.write(x[i].nodeName);//标签名
            document.write("<br/>");
            y = x[i].childNodes;//获取子节点
            for (j = 0; j < y.length; j++) {
                if (1==y[j].nodeType) {//是元素节点
                    document.write(y[j].nodeName);//标签名
                    document.write(":");
                    document.write(y[j].childNodes[0].nodeValue);//文本
                    document.write("<br/>");
                }
            }
            document.write("<br/>");
        }
    }

</script>