jQuery.extend(jQuery.jgrid.defaults, {
    prmNames: {
        page: 'pageNumber',
        rows: 'pageSize',
        sort: 'sortBy',
        order: 'sortDirection',
        search: 'search',
        nd: 'nd',
        npage: null
    },
    datatype: 'json',
    jsonReader: { root: 'items', cell: '', id: '0', repeatitems: false, page: 'pageNumber', total: 'pageCount', records: 'itemCount' },
    mtype: 'POST',
    rowNum: 50,
    rowList: [20, 50, 100, 250],
    viewrecords: true,
    height: 350,
    width: 758
});