<html>
<head>
<title>patternMismatch and valueMissing</title>
<script language="JavaScript" type="text/javascript">
    function log(message) {
        document.getElementById("console").innerHTML += "<li>"+message+"</li>";
    }

    function test() {
        if (window.testRunner)
            testRunner.dumpAsText();

        v = document.getElementsByName("victim");

        log(!v[0].validity.patternMismatch && v[0].validity.valueMissing ? "SUCCESS" : "FAILURE");
    }
</script>
</head>
<body onload="test()">
<input name="victim" type="text" pattern="[0-9][A-Z]{3}" required/>
<hr>
<ol id="console"></ol>
</body>
</html>