XML : can not load local xml file through xmlhttprequest

I am using XAMPP Apache on port 80.

When I try with localhost in the url I get:

XMLHttpRequest cannot load http://localhost/ice_escape/pokus.xml. Response to preflight request doesn't pass access control check: No 'Access-Control-Allow-Origin' header is present on the requested resource. Origin 'null' is therefore not allowed access.

and also:

Uncaught TypeError: Cannot read property '0' of null

I tried allowing CORS by adding this to httpd.conf to no avail:

  Header always set Access-Control-Allow-Origin "*"  Header always set Access-Control-Max-Age "1000"  Header always set Access-Control-Allow-Headers "X-Requested-With, Content-Type, Origin, Authorization, Accept, Client-Security-Token, Accept-Encoding"  Header always set Access-Control-Allow-Methods "POST, GET, OPTIONS, DELETE, PUT"    

Then I tried changing localhost to 127.0.0.1. It removes the first error, but the other error persists.

  var url = "http://127.0.0.1/iceescape/pokus.xml";  var xmlhttp;  if (window.XMLHttpRequest) {        xmlhttp = new XMLHttpRequest();  }    if (xmlhttp) {        xmlhttp.open("GET", url, true);      xmlhttp.setRequestHeader('Content-Type', 'text/xml');      xmlhttp.onreadystatechange = function () {          if (xmlhttp.readyState == 4) {              txt = xmlhttp.responseText;              {//---- some code that parses the xml                   var strWidth = "width";                   var a = txt.indexOf(strWidth);                   a += strWidth.length;                   txt = txt.slice(a,(txt.length) );                   var width = txt.match(/\d+/)[0];// here it says its null                                      }               }           }      };      xmlhttp.send();    

the xml:

  <?xml version="1.0" encoding="UTF-8"?>  <map width = "2400" height = "1800">      <ghost type="troll" speed="5">          <point>          {100,200}          </point>          <point>          {350,250}          </point>      </ghost>