1.books.html
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN">
<html>
<head>
<title></title>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
<script>
var xmlHttpReq = false;
function createXMLHttpRequest(){
try{
//Firefox,Opera8.0+,Safari
xmlHttpReq = new XMLHttpRequest();
}catch(e){
//Internet Explorer
try{
//Internet Explorer 6.0
xmlHttpReq = new ActiveXObject("Msxml2.XMLHTTP");
}catch(e){
已知有一个XML文件（bookstore.xml）如下：
<?xml version="1.0" encoding="gb2312"?>
<bookstore>
<book genre="fantasy" ISBN="2-3631-4">
<title>Oberon's Legacy</title>
<author>Corets, Eva</author>
&nb ......
