public static String getKeywords(final String htmlContent) {
		String keywords = "null";
		String regex_keywords = "<meta name=[\"]{0,1}[Kk]eywords[\"]{0,1} content=[\"]{0,1}(.*?)[ ]{0,1}[\"]{0,1}[ ]{0,1}[/]{0,1}[ ]{0,1}>";

		Pattern p_keywords = Pattern.compile(regex_keywords);
		Matcher m_keywords = p_keywords.matcher(htmlContent);
		while (m_keywords.find()) {
			keywords = m_keywords.group(1);
		}
		return keywords;
	}