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<?php
if(isset($_GET['do']) && $_GET['do']==='ajax')
{
exit("{msg:'Hello World!'}");
}
?>
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">
<html xmlns="http://www.w3.org/1999/xhtml">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8" />
<title>Ajax Demo</title>
<script type="text/javascript">
function readyStateChangeHandle(xhr)
{
// ¾ßÌå²Ù×÷,ÐèÒªÁ˽âÒ»ÏÂJavaScriptµÄÏà¹Ø֪ʶ
eval('var result='+xhr.responseText);
window.alert(result.msg);
}
function Ajax()
{
// ´´½¨Òì²½ÇëÇó¶ÔÏó
var xhr=window.ActiveXObject ? new ActiveXObject("Microsoft.XMLHTTP") : new XMLHttpRequest();
// ÅжÏһ϶ÔÏóÊÇ·ñ´´½¨³É¹¦
if(!xhr)
{
return false;
}
// ÉèÖÃÒì²½ÇëÇó´¦Àíº¯Êý(ÕâÀïÓÃÄäÃûº¯Êý¶ø²»Ö±½ÓÓö¨ÒåºÃµÄº¯Êý,Ö÷ÒªÊÇ·½±ã´«µÝ²ÎÊý)
xhr.onreadystatechange=function(){
// readyStateÓÐ4ÖÖ״̬(0=UNINITIALIZED,1=LOADING,2=LOADE ......

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1 JavaScript;
2 CSS£¨Ò³ÃæÑùʽ£©;
3 DOM£¨Ò³Ãæ¾Ö²¿¹ÜÀí£©;
4 xmlHttpRequest£¨Òì²½¶ÔÏó£©;
5 Òì²½¶ÔÏóÁ´½Ó·þÎñÆ÷;
var xmlHttp;
var xmlhttpObj = ["MSXML2.XmlHttp.5.0","MSXML2.XmlHttp.4.0","MSXML2.XmlHttp.3.0","MSXML2.XmlHttp","Microsoft.XmlHttp"];//ΪµÄÊÇie fireFox¼æÈÝ
function createXMLHttpRequest(){
if(window.ActiveXObject){
for(i=0;i<xmlhttpObj.length;i++)
{ s
xmlHttp = new ActiveXObject(xmlhttpObj[i]);
if(xmlHttp)
{
break;
}
alert(xmlhttpObj[i]);
}
}
else if(window.XMLHttpRequest){
xmlHttp=new XMLHttpRequ ......

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<asp:UpdatePanel ID="UpdatePanel2" runat="server">
          <ContentTemplate>
        <asp:GridView ID="GvPubList" runat="server" AutoGenerateColumns="False"
                CellPadding="4" ForeColor="#333333" GridLines="None"
                Width="100%" AllowPaging="True"
                OnPageIndexChanging="GvPubList_PageIndexChanging">
                <PagerSettings FirstPageText="Ê×Ò³" LastPageText="βҳ" Position="Bottom"
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var xmlhttp = new ActiveXObject("Msxml2.XMLHTTP");¡¡ //ʹÓýÏа汾µÄ IE ´´½¨ IE ¼æÈݵĶÔÏó£¨Msxml2.XMLHTTP£©
var xmlhttp = new ActiveXObject("Microsoft.XMLHTTP"); //ʹÓýÏÀÏ°æ±¾µÄ IE ´´½¨ IE ¼æÈݵĶÔÏó£¨Microsoft.XMLHTTP£©
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var xmlhttp = new XMLHttpRequest();
¡¡¡¡Êµ¼ÊÉÏInternet Explorer ʹÓÃÁËÒ»¸öÃûΪ XMLHttp µÄ¶ÔÏ󣬶ø²»ÊÇ XMLHttpRequest ¶ÔÏ󣬶ø Mozilla¡¢Opera¡¢Safari ºÍ ´ó²¿·Ö·Ç Microsoft ä¯ÀÀÆ÷¶¼Ê¹ÓõÄÊǺóÕߣ¨ÏÂÎÄͳ³Æ XMLHttpRequest ¶ÔÏ󣩡£IE7¿ªÊ¼Ò²¿ªÊ¼Ê¹ÓÃXMLHttpRequest ¶ÔÏóÁË¡£
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