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LoginValidate.aspx
<%@ Page Language="C#" AutoEventWireup="true" CodeFile="LoginValidate.aspx.cs" Inherits="LoginValidate" %>
<html xmlns="http://www.w3.org/1999/xhtml" >
<head runat="server">
<title>ÑéÖ¤Óû§ÃûÊÇ·ñ´æÔÚ</title>
<script type="text/javascript">
    var xmlHttp;
    function createXMLHttpRequest()
    {
        if(window.ActiveXObject)
        {
            xmlHttp = new ActiveXObject("Microsoft.XMLHTTP");
        }
        else if(window.XMLHttpRequest)
        {
            xmlHttp = new XMLHttpRequest();
        }
    }
    //´¦Àí·½·¨
    function CheckUserName()
    {
        createXMLHttpRequest();
        var url= "LoginValidate.ashx?username="+document.getElementById("username").value;
        xmlHttp.open("GET",url,true);
        xmlHttp.onreadystatechange=ShowResult;
        xmlHttp.send(null);
        //document.getElementById("Msg").innerHTML='';
    }
    //»Øµ÷·½·¨
    function ShowResult()
    {
        if(xmlHttp.readyState==4)
        {
            if(xmlHttp.status=


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AJAXÈëÃÅÖ®ÉîÈëÀí½âJavaScriptÖеĺ¯Êý

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FABridge½Ì³Ì(Flex+Ajax)

½ñÌìÕÒһЩFlex×ÊÁÏ£¬Å¼È»·¢ÏֺܶàÈËÔÚÎÊÓйØFABridgeµÄÎÊÌ⣬¿´ÁËһϣ¬´óÖ¶¼ÊÇÔÚÎÊÔÚFlashBuilderÖÐÈçºÎͨ¹ýFABridgeÀ´ÊµÏÖF-AµÄ½»»¥¡£¼òµ¥ËµËµ°É¡£
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ASP.NET Ajax Video Notes

ASP.NET Ajax Videoѧϰ±Ê¼Ç
5. Make Client-Side Network Callbacks with ASP.NET AJAX?
Notes:
ÔÚ<ScriptManager>ÖÐÌí¼Ó<Services>
4. Implement Dynamic Partial-Page Updates with ASP.NET AJAX?
Notes:
UpdatePanel¿ÉÒÔÍê³É²¿·ÖÒ³ÃæµÄ¸üÐÂ
Èç¹ûButtonÔÚUpdatePanelÖУ¬¼´Ê¹ÔÚPageLoad()Öаüº¬¸üÐÂË ......

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//JS´úÂë
function checkname() {
    var Msg = document.getElementById("d_username");
    var chk = CheckN();
    if (chk) {
        $.ajax({ url: 'registerOK.aspx',
        & ......

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  var xmlHttpRequest;
  
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