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function send_request(callback, urladdress, isReturnData){     
        var xmlhttp = getXMLHttpRequest();
        xmlhttp.onreadystatechange = function(){
                if (xmlhttp.readyState == 4) {//readystate Ϊ4¼´Êý¾Ý´«Êä½áÊø
                     try{
                        if(xmlhttp.status == 200){
                            if(isReturnData && isReturnData==true){
                                callback(xmlhttp.responseText);
                            }
                        }else{
                            callback("±§Ç¸£¬Ã»ÕÒµ½´ËÒ³Ãæ:"+ urladdress +"");
                        }
                    } catch(e){
                        callback("±§Ç¸£¬·¢ËÍÇëÇóʧ°Ü£¬ÇëÖØÊÔ " + e);
                    }
  


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<%@ page contentType="text/html;charset= ......

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/*
κÑÔAJAX Àà
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<mce:script type="text/javascript"><!--
var classAjax = new Ajax(sUrl,sRecvTyp,sQueryString,oResultFunc);
classAjax.post();//post·½Ê½·¢ËÍÊý¾Ý
classAjax.get();//get·½Ê½·¢ËÍÊý¾Ý
//sUrl·¢Ë͵ØÖ·
//sRecvTyp ½ÓÊÜÊý¾ÝÀàÐÍ:0Ϊxml 1Ϊtext
//oResultFunc ·µ»Ø½á¹û´¦Àíº ......

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ajaxµÄÁбíÁª¶¯Ê¾Àý
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    <select id="sel1" onchange="return choose(this);">
        <option value="">--ÇëÑ¡Ôñ--</option>
        <option value="1">ºþÄÏÊ¡</option>
&nb ......

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jsÎļþ:
var where=" where pd_Isjifen=0 and pd_Isok=1"; //²éѯÌõ¼þ
var psize=16; //²éѯÊý¾ÝÊýÄ¿
var pindex=0;//µ±Ç°Ò³Êý
var order=" order by pd_Update desc,type_sort,pd_brand,pd_typeid"; //ÅÅÐòÌõ¼þ
var temp=0; //Ä£°åÃû³Æ
var Pcount=0;

//»ñÈ¡²ÎÊý
function getUrlPara(p ......
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