{name: 'uniqueId', key: true, hidden: true}, //uniqueId=id+type
{name: 'id', editable: true, hidden: true, editrules: {edithidden:true}, hidedlg: true},
{name: 'type', editable: true, hidden: true, editrules: {edithidden:true}, hidedlg: true},

$grid.jqGrid('navGrid', '#pager', {edit: true, add: true, del: true},
    {}, {}, {
    onclickSubmit: function(options, delId){
        var rowData = $(this).jqGrid('getRowData', delId);
        return {
            id: rowData['id'],
            type: rowData['type']
        };
     }
});