Building tables dynamically with CGI class

I figured out how to build tables dynamically using methods in the CGI
class, but I can't figure out a way to add a header other than the
method I use below.  In the code below, I simply put the header row
into the array of rows generated by successive fetches from the
database.

The problem with the method I use below is that it forces me to use
<td> tags for the header columns when I would like to use <th> tags.

Any suggestions?


#!/usr/bin/env ruby

require 'dbi'
require 'cgi'

# connect to the database
dbh = DBI.connect('DBI:Mysql:test','','')

cgi = CGI.new("html4")

sth = dbh.prepare('select id, fname, lname from contact')
sth.execute
rows = [["ID","First","Last"]]
while row = sth.fetch_array() do
  rows.push(row)
end

cgi.out {
   cgi.head { cgi.title{"Name"} } +
   cgi.body {
      cgi.table('border'=>'1') {
         rows.collect { |row|
            cgi.tr {
               row.collect { |item|
                  cgi.td { item }
               }
            }
         }
      }
   }
}