<html>
<body onload="load()">
<script>
if (window.testRunner) {
testRunner.dumpAsText();
testRunner.waitUntilDone();
}
function load()
{
document.addEventListener("visibilitychange", onVisibilityChange, false);
location = "resources/page-visibility-alert-success.html";
}
function onVisibilityChange()
{
alert("visibilitychanged");
}
</script>
start document
</body>
</html>