<!DOCTYPE html>
<html>
<head>
    <title>Measure :focus update for a simple color change</title>
    <script src="../resources/runner.js"></script>
    <style type="text/css">
        body { margin: 0 }
        a { color: black; }
        a:focus { color: red; }
    </style>
</head>
<body>
    <script>
        for (var i=0; i<100; i++) {
            document.write('<div>');
            for (var j=0; j<100; j++)
                document.write('<a></a>');
            document.write('</div>');
        }
    </script>
    <div id="test"><a href="."></a><a href="."></div></div>
    <script type="text/javascript">
        document.body.offsetTop; // Force layout.

        var testDiv = document.getElementById("test");
        var a1 = testDiv.firstChild;
        var a2 = a1.nextSibling;

        PerfTestRunner.measureRunsPerSecond({
        description: "Measure :focus update for a simple color change",
        run:function() {
            a1.focus();
            document.body.offsetTop; // Update layout for focused state.
            a2.focus();
            document.body.offsetTop; // Update layout for focused state.
        }});
    </script>
</body>
</html>