thead elementtable element, after any
   caption, and colgroup
   elements and before any tbody, tfoot, and
   tr elements, but only if there are no other
   thead elements that are children of the
   table element.tr elementsHTMLTableSectionElement, as defined for
   tbody elements.The thead element represents the block of rows that consist of the column labels
  (headers) for the parent table element, if the
  thead element has a parent and it is a
  table.
The thead element takes part in the table
  model.
This example shows a thead element being used.
   Notice the use of both th and td elements
   in the thead element: the first row is the headers,
   and the second row is an explanation of how to fill in the
   table.
<table> <caption> School auction sign-up sheet </caption> <thead> <tr> <th><label for=e1>Name</label> <th><label for=e2>Product</label> <th><label for=e3>Picture</label> <th><label for=e4>Price</label> <tr> <td>Your name here <td>What are you selling? <td>Link to a picture <td>Your reserve price <tbody> <tr> <td>Ms Danus <td>Doughnuts <td><img src="http://example.com/mydoughnuts.png" title="Doughnuts from Ms Danus"> <td>$45 <tr> <td><input id=e1 type=text name=who required form=f> <td><input id=e2 type=text name=what required form=f> <td><input id=e3 type=url name=pic form=f> <td><input id=e4 type=number step=0.01 min=0 value=0 required form=f> </table> <form id=f action="/auction.cgi"> <input type=button name=add value="Submit"> </form>