<!doctype html>
<html>
  <head>
    <meta charset="utf-8">
    <title>XMLHttpRequest: setRequestHeader() value argument checks</title>
    <script src="/resources/testharness.js"></script>
    <script src="/resources/testharnessreport.js"></script>
    <link rel="help" href="https://xhr.spec.whatwg.org/#the-setrequestheader()-method" data-tested-assertations="/following::ol/li[4]" />
  </head>
  <body>
    <div id="log"></div>
    <script>
      function try_value(value) {
        test(function() {
        