public static boolean deleteInfo(String title){
		boolean flag=false;
		try{
			contct=connector.getConnection();
			Sttt=contct.prepareStatement("delete from bk where title ='"+title+"'");
            if(Sttt.executeUpdate()==1)flag=true;
		}catch(SQLException e){
			System.out.println(e.getMessage());
		}
		connector.Close(contct, Sttt);
		return flag;
	}