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<!DOCTYPE html>
<html>
<body>
​
<p>The getResponseHeader() function is used to return specific header information from a resource, like length, server-type, content-type, last-modified, etc.</p>
​
<button onclick="loadXMLDoc('xmlhttp_info.txt')">Get "Last-Modified" information</button>
​
<p id="demo"></p>
​
<script>
function loadXMLDoc(url) {
  var xmlhttp = new XMLHttpRequest();
  xmlhttp.onreadystatechange = function() {
    if (this.readyState == 4 && this.status == 200) {
      document.getElementById("demo").innerHTML =
      "Last modified: " + this.getResponseHeader('Last-Modified');
    }
  };
  xmlhttp.open("GET.html", url, true);
  xmlhttp.send();
}
</script>
​
</body>
​
<!-- Mirrored from www.w3schools.com/xml/tryit.asp?filename=try_dom_xmlhttprequest_lastmodified by HTTrack Website Copier/3.x [XR&CO'2014], Wed, 05 Jun 2019 13:02:19 GMT -->
</html>
​
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