reading from a text file

reading from a text file

Hi i m using the code below to read text file content. The text "Let jQuery AJAX Change This Text" doesnt change at all. I have tried ..
    $("#div1").load("file:///C:/demo_test.txt #p1");
    $("#div1").load("demo_test.txt #p1");

    $("#div1").load("C:/demo_test.txt #p1");


Please help.
Thanks

-------------------------------------------------

<!DOCTYPE html>
<html>
<head>
<script src="//ajax.googleapis.com/ajax/libs/jquery/1.8.3/jquery.min.js">
</script>
<script>
$(document).ready(function(){
  $("button").click(function(){
    $("#div1").load("file:///C:/demo_test.txt #p1");
  });
});
</script>
</head>
<body>

<div id="div1"><h2>Let jQuery AJAX Change This Text</h2></div>
<button>Get External Content</button>

</body>
</html>


</html>