content="A specific side of a table header group can be specified under the collapsing border model." />

  <style type="text/css"><![CDATA[
  table {border-collapse: collapse;}

  td
  {
  border: black solid 1px;
  height: 50px;
  width: 50px;
  }

  thead {border-bottom: blue solid 10px;}
  ]]></style>

 </head>

 <body>

  <p>Test passes if there is a blue border across the top of the middle row of a three-by-three table. There should be no blue anywhere else.</p>

  <table>
      <thead>
          <tr>