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//AjaxÓ¦ÓõÄÎå¸ö²½Öè
//1.´´½¨XMLHttpRequest¶ÔÏó
var xmlHttp=createXMLHttpRequest();
function createXMLHttpRequest()

 var xmlHttp;
 if(Window.XMLHttpRequest)
 { 
  //IE6ÒÔÉϰ汾ºÍÆäËûä¯ÀÀÆ÷ÄÚÖÃXMLHttpRequest¶ÔÏó
  xmlHttp=new XMLHttpRequest();
 }
 else if(Window.ActiveXObject)
 {
  //ÔÚIE6¼°ÆäÒÔÏÂä¯ÀÀÆ÷¿ÉÒÔͨ¹ýActiveXObjectµÄÁ½¸ö¿Ø¼þÀ´´´½¨£¬½«°æ±¾ÐµķÅÔÚÇ°Ãæ
  var activexName=["MSXML2.XMLHTTP", "Microsoft.XMLHTTP"];
  for(var i=0; i<activexName.length; i++)
  {
   try
   { //È¡³öÒ»¸ö¿Ø¼þÃû½øÐд´½¨£¬´´½¨³É¹¦¾ÍÖÕֹѭ»·
    xmlHttp=new ActiveXObject(activexName[i]);
    break;
   }
   catch(e){};
  }
 }
 //È·ÈÏXMLHttpRequest¶ÔÏó´´½¨³É¹¦
 if(!xmlHttp)
 {
  alert("XMLHttpRequest¶ÔÏó´´½¨Ê§°Ü£¡");
  return;
 }
 else
 {
  //alert(xmlHttp);
  return xmlHttp;
 }
}
//2.×¢²á»Øµ÷º¯Êý
xmlHttp.onreadystatechange=callback;
//3.³õʼ»¯XMLHttpRequest¶ÔÏó£¬ÉèÖÃÁ¬½ÓÐÅÏ¢
//µÚÒ»¸ö²ÎÊý±íʾhttpµÄÇëÇó·½Ê½£¬·ÖΪGETºÍPOSTÁ½ÖÖ£¬GET·½Ê½ÇëÇóµÄ²ÎÊýÔÚURLÖÐ
//µÚ¶þ¸ö²ÎÊý±íʾÇëÇóµÄurlµØÖ·£¬¸ÃµØÖ·»á±»½âÎöΪ¾ø¶ÔµØÖ·
//µÚÈý¸ö²ÎÊý±íʾÇëÇó·½Ê½ÊÇͬ²½»òÊÇÒì²½£¬Ä¬ÈÏÊÇͬ²½true£¬µÚËÄ£¬Îå¸ö²ÎÊýͨ³£²»ÓÃ
xmlHttp.open("GET",url, true);
//4.·¢ËÍÊý¾Ý£¬¿ªÊ¼ºÍ·þÎñÆ÷¶Ë½øÐн»¸¶
//ͬ²½·½Ê½Ï£ºsend()Õâ¾ä»°»áÔÚ·þÎñÆ÷¶ËµÄÊý¾Ý´«ËÍ»ØÀ´ºó²ÅÖ´ÐÐÍ꣬ÔÙÖ´ÐÐÏÂÒ»ÌõÓï¾ä
//Òì²½·½Ê½Ï£ºsend()Õâ¾ä»°»áÁ¢¼´Ö´ÐÐÍ꣬½Ó×ÅÖ´ÐÐÏÂÒ»ÌõÓï¾ä
//ÈôÒÔPOST·½Ê½,ÐèÒª×Ô¼ºÉèÖÃhttpµÄÇëÇóÍ·
//xmlHttp.open("POST",url,true);
//xmlHttp.setRequestHeader("Content-Type","application/x-www-form-urlencoded");
//xmlHttp.send("name="+value);
xmlHttp.send(null); //¸Ã²ÎÊýΪ¿ÉÑ¡£¬´ËʱҲ¿É²»Ð´
//5.¶¨Ò廨µ÷º¯Êý£¬¸Ãº¯ÊýÖ÷Òª¸ºÔð½ÓÊÕ´Ó·þÎñÆ÷¶Ë´«»ØÀ´µÄÊý¾Ý£¬²¢ÔÚÒ³ÃæÉÏÏÔʾ
function callback()
{
 //Åж϶ÔÏóµÄ½»»¥×´Ì¬Ê


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<%@page language="java" import="java.util.*" pageEncoding="UTF-8"%>
<% String path=request.getContextPath();   %>
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<script type="text/javascript">
  function ajaxFunction(sort){
   var xmlHttp;
   try{
      // Firefox, Opera 8.0+, Safari
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