def build_href_tag(url, display_text, new_window=False, title=None):
    """
    Returns the HTML to build an <a href...> tag string from values supplied
    WARNING: There is NO filtering or escaping of ANY characters.
    Character cleansing must be performed prior to calling this method.
    """
    target = "target='_blank' " if new_window else ''
    return "<a {0}href='{1}'{2}>{3}</a>".format(target, url, 'title="{0}"'.
        format(title) if title else '', display_text)
