XML : How to read local xml file using javascript?

Maybe the problem is that i wrote path to my file incorrectly, i'm using Linux, do i have to write path in some different way?

  <script type="text/javascript">    function func(){      var xmlFile = new XMLHttpRequest();      xmlFile.open("GET", "/home/kat/course/data.xml", false);      xmlFile.send();      xmlDoc = xmlFile.responseXML;        document.getElementById("result_field").value = xmlDoc;    }  </script>