public List listAllAdmin() {
		SQLCommand cmd=new SQLCommand();
		RowSet rs=cmd.queryRowSet("select * from admins");
		List<Admin> list=new ArrayList<Admin>();
		Admin admin;
		try {
			while(rs.next()){
				admin=new Admin();	
				admin.setA_id(rs.getLong("a_id"));
				admin.setA_user(rs.getString("a_user"));
				admin.setA_pass(rs.getString("a_pass"));
				admin.setA_email(rs.getString("a_email"));
				admin.setA_phone(rs.getString("a_phone"));
				list.add(admin);
			}
			 return list;
		} catch (SQLException e) {
			e.printStackTrace();
			return null;
		} 
	}