xmlhttp中文乱码

Question

js代码
        var oHttpReq=new ActiveXObject("Microsoft.XMLHTTP");//MSXML2.XMLHTTP
        var odoc=new ActiveXObject("MSXML2.DOMDocument");
      
        var state=document.getElementById("studycar").value;//studycar 是个dropdownlist
        //alert("state"+state);
        oHttpReq.open("POST","xml_drop.aspx?studycar="+state,false);
        
        oHttpReq.send("");
       
        
        result=oHttpReq.responseText;
        
        odoc.loadXML(result);
        alert(result);//返回的 result是个xml 这里显示的 我的中文是乱码 有什么解决办法吗？xml_drop.aspx代码                string state = this.Request.QueryString["studycar"].Trim();
                classkind ck = new classkind();
                DataSet ds = new DataSet();
                DataTable dt = ck.GetClassKind(" and classtype='" + state + "'");
                ds.Tables.Add(dt);
                XmlTextWriter w = new XmlTextWriter(this.Response.OutputStream, Response.ContentEncoding);
                w.Formatting = Formatting.Indented;
                w.Indentation = 4;
                w.IndentChar = ' ';
               
                ds.WriteXml(w);
                w.Flush();
                this.Response.End();
                w.Close();

Answer 1

xml_drop.aspx代码 Page_load里面，加如下代码Response.Clear();
            Response.ContentType = "text/html";     //设置输出的格式为html
            if (CmfuConfig.Instance.AppSetting.IsBig5)
            {
                Response.Charset = "UTF-8";              //设置输出的编码为UTF-8
            }
            else
            {
                Response.Charset = "gb2312";
            }

Answer 2

xml_drop.aspx代码 Page_load里面，加如下代码Response.Clear();
Response.ContentType = "text/html";     //设置输出的格式为html
Response.Charset = "UTF-8";              //设置输出的编码为UTF-8
//Response.Charset = "gb2312";
根据相应选择

Answer 3

CmfuConfig.Instance.AppSetting.IsBig5
请问这是什么？