    {field: 'level', width: 80, title: '等级', sort: true, edit: true, align: 'center'},
                {field: 'create_time', width: 200, title: '注册时间', sort: true, align: 'center'},
                {field: 'update_time', width: 200, title: '登录时间', sort: true, align: 'center'},
                {title: '操作', width: 120, toolbar: '#currentTableBar', align: "center", fixed: 'right'}
            ]],
            limits: [10, 15, 20, 25, 50, 100],
            limit: 15,
            