xml결과사용하는법

<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd">

<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="ko" lang="ko">
<head>
<meta http-equiv="content-type" content="text/html; charset=euc-kr" />
<title>XML로부터 객체 생성</title>

<script type="text/javascript　">
var ajax = {};
ajax.xhr = {};

ajax.xhr.Request = function(url, params, callback, method) {
  this.url = url;
  this.params = params;
  this.callback = callback;
  this.method = method;
  this.send();
}

ajax.xhr.Request.prototype = {
  getXMLHttpRequest: function() {
  if (window.ActiveXObject) {
   try {
    return new ActiveXObject("Msxml2.XMLHTTP");
   } catch(e) {
    try {
     return new ActiveXObject("Microsoft.XMLHTTP");
    } catch(e1) { return null; }
   }
  } else if (window.XMLHttpRequest) {
   return new XMLHttpRequest();
  } else {
   return null;
  }
},
send: function() {
  this.req = this.getXMLHttpRequest();

  var httpMethod = this.method ? this.method : 'GET';
  if (httpMethod != 'GET' && httpMethod != 'POST') {
   httpMethod = 'GET';
  }
  var httpParams = (this.params == null || this.params == '') ? null : this.params;
  var httpUrl = this.url;
  if (httpMethod == 'GET' && httpParams != null) {
   httpUrl = httpUrl + "?" + httpParams;
  }
  this.req.open(httpMethod, httpUrl, true);
  this.req.setRequestHeader(
   'Content-Type', 'application/x-www-form-urlencoded');
  var request = this;
  this.req.onreadystatechange = function() {
   request.onStateChange.call(request);
  }
  this.req.send(httpMethod == 'POST' ? httpParams : null);
},
onStateChange: function() {
  this.callback(this.req);
}
}

window.onload = function() {
  new ajax.xhr.Request("http://kr.open.gugi.yahoo.com/service/rgc.php", "appid=VyY1f0DV34G8HA3UnPbygP8VofLY38zM57lJ7wC7HS3qyxGTBiqrfKa7Qqpetfw&latitude=37.4997677193116&longitude=129.0294189453125&output=xml", viewInfo, "GET");
}
function viewInfo(req) {
  if (req.readyState == 4) {
   if (req.status == 200) {
    var docXML = req.responseXML;
    var code = docXML.getElementsByTagName("Found")
                     .item(0).firstChild.nodeVal　ue;
    if (code == '1') {
     var country = docXML.getElementsByTagName("country")
          .item(0).firstChild.nodeVal　ue;
     var state = docXML.getElementsByTagName("state")
                      .item(0).firstChild.nodeVal　ue;
     var county = docXML.getElementsByTagName("county")
                      .item(0).firstChild.nodeVal　ue;
     var town = docXML.getElementsByTagName("town")
                      .item(0).firstChild.nodeVal　ue;

     alert(country+state+county+town);
    } else {
     alert("실패");
    }
   } else {
    alert("에러 발생:"+req.status);
   }
  }
}
</script>
</head>
<body>
</body>
</html>

브라우져에서xml로 결과가나오는데 이것을 돔을사용해서 접근해서 정보를 가져오려고 하는데 잘안되네요
브라우져실행하면 접근권한이없다고 나오는데
잘알려주세요

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