  var client = new XMLHttpRequest();
          client.open("GET", "...");
          assert_throws_dom("SyntaxError", function() { client.setRequestHeader("x-test", value) }, ' given value ' + value+', ');
        });
      }
      try_value("t\x00t");
      try_value("t\rt");
      try_value("t\nt");
      test(function() {
        var client = new XMLHttpRequest();
        client.open("GET", "...");
        assert_throws_js(TypeError, function() { client.setRequestHeader("x-test", "ﾃｽﾄ") }, ' given v