黄聪：Jquery+DataTables插件，如何在ajax调用服务器数据后，自动给tr添加id属性

http://legacy.datatables.net/usage/callbacks#fnRowCallback

主要通过 fnCreatedRow 事件来实现

var table = $('#table_id').dataTable( {
        "processing": true,
        "serverSide": true,
        "ajax": {
            "url": "#",
            "type": "POST",
            "data" : { "action" : "table-ajax-data" }
        },
       "columns": [
        { "data": 'id', "name": '编号', "width": '80px' },
        { "data": 'cat', "name": '分类' },
        { "data": 'sub_cat', "name": '子类', "orderable": false, "visible": false, "searchable": false }
    ],
    "fnCreatedRow": function( nRow, aData, iDataIndex ) {
            if( typeof( aData.id ) != "undefined" ) {
                $( nRow ).attr( "tr_id", aData.id );
            }
    }
    } );