def build_search_form():
    """ 
    returns the html for a simple search form 
    """
    txt = '<form action="." method="POST">\n'
    txt += '  <input type="text" name="search_text">\n'
    txt += '  <input type="submit" name="my-form" value="Search">\n'
    txt += '</form>\n'
    return txt
