XMLHttpRequest of ajax

;    val = conn.getDate();
      if (val != 0 && !gotDate) this._headers[this._headers.length] = {h:''Date'', v:(new Date(val)).toUTCString()};
      val = conn.getExpiration();
      if (val != 0 && !gotExpiration) this._headers[this._headers.length] = {h:''Expires'', v:(new Date(val)).toUTCString()};
      val = conn.getLastModified();
      if (val != 0 && !gotLastModified) this._headers[this._headers.length] = {h:''Last-modified'', v:(new Date(val)).toUTCString()};
      // read response data
      var reqdata = '''';
      var stream = conn.getInputStream();
      if (stream)
      {
        var reader = new java.io.BufferedReader(new java.io.InputStreamReader(stream, this._getCharset()));
        var line;
        while ((line = reader.readLine()) != null)
        {
          if (this.readyState == 2)
          {
            this.readyState = 3;
            if (this.onreadystatechange)
            {
              this.onreadystatechange();
            }
          }
          reqdata += line + ''\n'';
        }
        reader.close();
        this.status = 200;
        this.statusText = ''OK'';
        this.responseText = reqdata;
        this.readyState = 4;
        if (this.onreadystatechange)
        {
          this.onreadystatechange();
        }
        if (this.onload)
        {
          this.onload();
        }
      }
      else
      {
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