AJAX在GB2312的中文编码传输 AJAX特殊字符编码正确

var xmlHttp;
function createXML(){
if(window.ActiveXObject){
xmlHttp=new ActiveXObject("Microsoft.XMLHTTP");
}else if(window.XMLHttpRequest){
xmlHttp=new XMLHttpRequest();
}
}
function startXml(){
createXML();
xmlHttp.onreadystatechange = handleStateChange;
var url="ajaxtext.asp?tm=1&"+Math.random();
//var sendContents = 'theinput='+escape(theinput.value);
var regcode="2abc";
xmlHttp.open("get",url,true);
//regcode="regcode="+regcode;
//xmlHttp.setrequestheader("content-length",regcode.length); //可加可不加
//xmlHttp.setRequestHeader("Cache-Control","no-cache");
//xmlHttp.setRequestHeader('Content-type','application/x--form-urlencoded'); //可不加
//xmlHttp.send(null);
//xmlHttp.send("regcode="+escape(regcode));
xmlHttp.send(null);
}
function handleStateChange(){
if (xmlHttp.readyState == 4 && xmlHttp.status==200){
//var divid=document.getElementById("results");
retext=xmlHttp.responseText;
alert(retext);
//if(divid.hasChildNodes()){
// divid.removeChild(divid.childNodes[0]);
/