need help lining button with input field please

[StoreOwner]

http://i.imgur.com/2bnpLN6.jpg

#categorySearch {
text-align: center;
}

it's centered right but vertically its not right


and php code..

  $content = "";
  $content .= zen_draw_form('quick_find_header', zen_href_link(FILENAME_ADVANCED_SEARCH_RESULT, '', $request_type, false), 'get');
  $content .= zen_draw_hidden_field('main_page',FILENAME_ADVANCED_SEARCH_RESULT);
// BOF search in current category only
  $content .= zen_draw_hidden_field('search_in_description', '1');
  if($current_category_id) {
	  $content .= zen_draw_hidden_field('categories_id', $current_category_id);
	  $content .= zen_draw_hidden_field('inc_subcat', '1');
  }
  $content .=  zen_hide_session_id();
  // EOF search in current category only

  if (strtolower(IMAGE_USE_CSS_BUTTONS) == 'no') {
    $content .= zen_draw_input_field('keyword', '', 'size="6" maxlength="30" style="width: 100px" value="' . HEADER_BOX_SEARCH . '" onfocus="if (this.value == \'' . HEADER_BOX_SEARCH . '\') this.value = \'\';" onblur="if (this.value == \'\') this.value = \'' . HEADER_BOX_SEARCH . '\';"') . ' ' . zen_image_submit (BUTTON_IMAGE_SEARCH,HEADER_SEARCH_BUTTON);
  } else {
    $content .= zen_draw_input_field('keyword', '', 'size="6" maxlength="30" style="width: 100px" value="' . HEADER_BOX_SEARCH . '" onfocus="if (this.value == \'' . HEADER_BOX_SEARCH . '\') this.value = \'\';" onblur="if (this.value == \'\') this.value = \'' . HEADER_BOX_SEARCH . '\';"') . '&nbsp;<input type="submit" value="' . HEADER_SEARCH_BUTTON . '" style="width: 45px" />';
  }

  $content .= "</form>";
?>

[yaritai]

http://i.imgur.com/2bnpLN6.jpg

#categorySearch {
text-align: center;
}

it's centered right but vertically its not right


and php code..

  $content = "";
  $content .= zen_draw_form('quick_find_header', zen_href_link(FILENAME_ADVANCED_SEARCH_RESULT, '', $request_type, false), 'get');
  $content .= zen_draw_hidden_field('main_page',FILENAME_ADVANCED_SEARCH_RESULT);
// BOF search in current category only
  $content .= zen_draw_hidden_field('search_in_description', '1');
  if($current_category_id) {
	  $content .= zen_draw_hidden_field('categories_id', $current_category_id);
	  $content .= zen_draw_hidden_field('inc_subcat', '1');
  }
  $content .=  zen_hide_session_id();
  // EOF search in current category only

  if (strtolower(IMAGE_USE_CSS_BUTTONS) == 'no') {
    $content .= zen_draw_input_field('keyword', '', 'size="6" maxlength="30" style="width: 100px" value="' . HEADER_BOX_SEARCH . '" onfocus="if (this.value == \'' . HEADER_BOX_SEARCH . '\') this.value = \'\';" onblur="if (this.value == \'\') this.value = \'' . HEADER_BOX_SEARCH . '\';"') . '##' . zen_image_submit (BUTTON_IMAGE_SEARCH,HEADER_SEARCH_BUTTON);
  } else {
    $content .= zen_draw_input_field('keyword', '', 'size="6" maxlength="30" style="width: 100px" value="' . HEADER_BOX_SEARCH . '" onfocus="if (this.value == \'' . HEADER_BOX_SEARCH . '\') this.value = \'\';" onblur="if (this.value == \'\') this.value = \'' . HEADER_BOX_SEARCH . '\';"') . '##<input type="submit" value="' . HEADER_SEARCH_BUTTON . '" style="width: 45px" />';
  }

  $content .= "</form>";
?>

Either move the search box up or move the search button down. The text-align: center does not do anything to vertical alignment. Sorry for such a simple answer but nothing can be done without a reference to a site to look at.