om("SecurityError", function() { iframe.contentWindow.location.port; });
          assert_throws_dom("SecurityError", function() { iframe.contentWindow.location.hostname; });
          assert_throws_dom("SecurityError", function() { iframe.contentWindow.location.pathname; });
          assert_throws_dom("SecurityError", function() { iframe.contentWindow.location.hash; });
          assert_throws_dom("SecurityError", function() { iframe.contentWindow.location.search; });
          assert_throws_dom("Security