<script>

var runTests = function () {
    document.getElementById("dt1").removeChild(document.getElementById("summary2"));

    if (!window.testRunner || !window.eventSender)
        return;
    eventSender.mouseMoveTo(2, 2);
    eventSender.mouseDown();
    eventSender.mouseUp();
};

</script>

<body style="margin: 0px" onload="runTests()">
    <details id="dt1">
        <summary id="summary1">summary 1</summary>
        <summary id="summary2">summary 2</summary>
    </details>
</body>