script>
        <!-- Additional helper script for common checks across event types -->
        <script type="text/javascript" src="pointerevent_support.js"></script>
        <script type="text/javascript">
            var detected_pointertypes = {};
            var test_pointerEvent = async_test("pointermove has same isPrimary as last pointerdown"); // set up test harness
            // showPointerTypes is defined in pointerevent_support.js
            // Requirements: the callback function will reference t