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index.jsp
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
        <title>AJAX ¼¼Êõ¼òµ¥Ó¦ÓÃ</title>
        <script type="text/javascript">
            var xmlhttp ;
            //1.´´½¨xmlHttpRequest ¶ÔÏó£¬ÕâÊÇ×îÖØÒªµÄÒ»²½
            function creatXMLHttpRequest(){
                if(window.XMLHttpRequest){
                    //IE7 IE8 FireFox Mozillar Safari ,Opera
                    xmlhttp=new XMLHttpRequest();
                    //alert("XMLHttpRequest");
                    if(xmlhttp.overrideMimeType){
                        xmlhttp.overrideMimeType("text/xml");
                      
                    }
                }
                else if(window.ActiveXObject){


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function  updateDB(operate){
  var objDom=new ActiveXObject("msxml.DomDocument");
   var objRoot=objDom.createElement("All");
   objDom.appendChild(objRoot);
  
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дһ¸öajax funciton

function Ajax(url)
{
var m_xmlReq=null;
if(window.ActiveXObject)
{
try
{
m_xmlReq = new ActiveXObject('Msxml2.XMLHTTP');
}
catch(e)
{
try{m_xmlReq = new ActiveXObject('Microsoft.XMLHTTP');}catch(e){}
}
}
else if(window.XMLHttpRequest ......

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var http_request;
    function find(txt) {
        http_request = new ActiveXObject("Microsoft.XMLHTTP");
        http_request.onreadystatechange = function() {
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