<head>
    <meta name="viewport" content="width=device-width">
    <script>
        var haveClicked = false;
        function runTest(e) {
            if (haveClicked) {
                e.value = "Test passed";
                e.disabled = true;
                return;
            }
            e.value = "Click me again";
            e.focus();
            haveClicked = true;
        }
    </script>
</head>

<body>
    <center>
        <input type=submit onclick="runTest(this); return false;" value="Click me" style="font-size: 36px">
    </center>
    <br><br>
    <div style="font-size: 20px; font-family: helvetica;">
        Test for WebKit bug #<a href="https://bugs.webkit.org/show_bug.cgi?id=143624">143624</a>
        <br><br>
        Tap button above twice to run test. &ldquo;Test passed&rdquo; will
        appear above if the test passes. If you cannot click the button a
        second time, the test failed.
        <br><br>
        To rerun this test, open it in a new tab. Do not reload.
    </div>
</body>