    <meta name="assert" content="The 'hidden' border is the dominant border when it is collapsed with a 'dotted' border." />
        <style type="text/css">
            table
            {
                border-collapse: collapse;
            }
            td
            {
                border: 5px dotted lime;
                height: 3em;
                width: 3em;
            }
            #center
            {
                border: 5px hidden red;
            }
            #top
            {
      