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+<p>This test ensures that document.write after page load is synchronous.</p>
+<p>You will get a PASS or FAIL alert message after a few seconds.</p>
+<script>
+window.onload = function() {
+
+    // Build a very long string to write.
+    var LIMIT = 17;
+    var str = '<p style="display:none">x</p>';
+    for (var i=0; i<LIMIT; ++i)
+        str += str;
+
+    // Write the string and check the DOM immediately and after a small delay.
+    var doc = document.implementation.createHTMLDocument();
+    doc.write(str);
+    var immediateElementCount = doc.getElementsByTagName('*').length;
+    setTimeout(function() {
+        var delayedElementCount = doc.getElementsByTagName('*').length;
+        var passOrFail = (immediateElementCount === delayedElementCount ? "PASS" : "FAIL");
+        alert(passOrFail);
+    }, 100);
+
+}
+</script>