1 files changed, 20 insertions, 0 deletions
diff --git a/testing/web-platform/tests/html/semantics/embedded-content/the-iframe-element/support/iframe_sandbox_028.htm b/testing/web-platform/tests/html/semantics/embedded-content/the-iframe-element/support/iframe_sandbox_028.htm
new file mode 100644
index 0000000000..d7ca761441
--- /dev/null
+++ b/testing/web-platform/tests/html/semantics/embedded-content/the-iframe-element/support/iframe_sandbox_028.htm
@@ -0,0 +1,20 @@
+<!DOCTYPE html>
+<html>
+<head><title>Access parent dom</title>
+</head>
+<body>
+    <script type="text/javascript">
+        try
+        {
+            if (window.parent.document)
+            {
+                parent.window.postMessage("window.parent.document", "*");
+            }
+        }
+        catch(e)
+        {
+            parent.window.postMessage("!window.parent.document", "*");
+        }
+    </script>
+</body>
+</html>