Retrieving a Static File

When the button is clicked, the content of the file "test.txt" in the server is displayed.
RESETRUNFULL
<!DOCTYPE html><html><head>
<script>

function loadText(){
   var xhr;
   xhr=new XMLHttpRequest();  
   xhr.onreadystatechange=function(){
     if (xhr.readyState==4 && xhr.status==200)
     document.getElementById("div").innerHTML=xhr.responseText;
   };
   xhr.open("GET","test.txt",true);
   xhr.send();
}
</script></head>

<body>
   <div id="div"></div>
   <button type="button" onclick="loadText()">
       Retrieve Text</button>

</body></html>