document.write(
  '<form class="search_form" action="/cgi-local/search/search.cgi" method="GET" style="margin:0;padding:0;">' +
  '<input type="hidden" name="act" value="search" />' +
  '<input type="hidden" name="userid" value="49" />' +
  '<input type="text" name="keyword" size="16" />' +
  '<input type="submit" value="サイト内検索" />' +
  '</form>'
);