public static Date timeS2l(String timeStr)
    {
        int i;
        if(timeStr == null)
            return null;
        i = 0;

	    for(;i<timeFormat.length;)
	    {
        Date dateLong;
		try {
			dateLong = ((SimpleDateFormat)dateFormatList.get(i)).parse(timeStr);
		} catch (ParseException e) {
			// TODO Auto-generated catch block
			e.printStackTrace();
			return null;
		}
        if(dateLong != null)
            return dateLong;
	    }
        return null;
    }