<!DOCTYPE html> 
<html>
<head>
<script>
if (window.testRunner) {
    testRunner.dumpAsText();
    testRunner.waitUntilDone();
}

var step = 0;

onscroll = function() {
    document.getElementById('log').innerText += 'x';

    switch (step) {
    case 0:
        if (window.eventSender)
            eventSender.keyDown('pageUp');
            break;
    case 1:
        document.getElementById('results').innerText = 'PASS';
        if (window.testRunner)
            testRunner.notifyDone();
        break;
    }
    
    step++;
}

function runTest()
{
    if (window.eventSender)
        eventSender.keyDown('pageDown');
}
</script>
</head>
<body onload="runTest()"> 
<span id="log" style="position:fixed"></span> 
<div>This test simulates hitting page up and page down once each. Both keypresses should generate exactly one scroll event. If running manually, press the keys now.</div>
<div id="results">FAIL</div>
<div style="height:50000px">(just here to force scrollbars)</div> 
<script> 
</script>
</body>
</html>