1<p>This test ensures that document.write after page load is synchronous.</p> 2<p>You will get a PASS or FAIL alert message after a few seconds.</p> 3<script> 4window.onload = function() { 5 6 // Build a very long string to write. 7 var LIMIT = 17; 8 var str = '<p style="display:none">x</p>'; 9 for (var i=0; i<LIMIT; ++i) 10 str += str; 11 12 // Write the string and check the DOM immediately and after a small delay. 13 var doc = document.implementation.createHTMLDocument(); 14 doc.write(str); 15 var immediateElementCount = doc.getElementsByTagName('*').length; 16 setTimeout(function() { 17 var delayedElementCount = doc.getElementsByTagName('*').length; 18 var passOrFail = (immediateElementCount === delayedElementCount ? "PASS" : "FAIL"); 19 alert(passOrFail); 20 }, 100); 21 22} 23</script> 24