chromium/third_party/blink/web_tests/fast/forms/style-display-none.html

<html>
<body>
 <p>This tests to see if 'style.display' for an element can be set dynamically.  See bug 820947. </p>

<script>
if (window.testRunner)
    testRunner.dumpAsText();

document.writeln("<div  id=\"result\"> \r\n  This test: FAILED </div>\r\n");
document.writeln("<div  id=\"announce:Top\">\r\n This text should be hidden </div>\r\n");

var announceTop = document.getElementById("announce:Top");
announceTop.style.display = "none";
if ( announceTop.style.display == "none" ) {
   document.getElementById("result").innerHTML=' This test: PASSED!'
}

</script>

</body>
</html>