Ajax Jquery: Load data from file and return to the element

<script>
$(document).ready(function(){
  $("button").click(function(){
	  $("#div1").load("demo_test.txt", function(responseTxt, statusTxt, xhr){
	    if(statusTxt == "success")
	      alert("External content loaded successfully!");
	    if(statusTxt == "error")
	      alert("Error: " + xhr.status + ": " + xhr.statusText);
	  });
	});
});
</script>