Я начинаю в jqGrid, я пишу этот код для группировки групп

$(function () {
            var mydata = [
                          { id: "11", invdate: "2007-10-01", name: "test", note: "note", amount: "200.00", tax: "10.00", total: "210.00" },
                          { id: "12", invdate: "2007-10-02", name: "test2", note: "note2", amount: "300.00", tax: "20.00", total: "320.00" },
                          { id: "13", invdate: "2007-09-01", name: "test3", note: "note3", amount: "400.00", tax: "30.00", total: "430.00" },
                          { id: "14", invdate: "2007-10-04", name: "test", note: "note", amount: "200.00", tax: "10.00", total: "210.00" },
                          { id: "15", invdate: "2007-10-05", name: "test2", note: "note2", amount: "300.00", tax: "20.00", total: "320.00" },
                          { id: "16", invdate: "2007-09-06", name: "test3", note: "note3", amount: "400.00", tax: "30.00", total: "430.00" },
                          { id: "17", invdate: "2007-10-04", name: "test", note: "note", amount: "200.00", tax: "10.00", total: "210.00" }, 
                          { id: "18", invdate: "2007-10-03", name: "test2", note: "note2", amount: "300.00", tax: "20.00", total: "320.00" },
                          { id: "19", invdate: "2007-09-01", name: "test3", note: "note3", amount: "400.00", tax: "30.00", total: "430.00" },
                          { id: "21", invdate: "2007-10-01", name: "test", note: "note", amount: "200.00", tax: "10.00", total: "210.00" },
                          { id: "22", invdate: "2007-10-02", name: "test2", note: "note2", amount: "300.00", tax: "20.00", total: "320.00" },
                          { id: "23", invdate: "2007-09-01", name: "test3", note: "note3", amount: "400.00", tax: "30.00", total: "430.00" }, 
                          { id: "24", invdate: "2007-10-04", name: "test", note: "note", amount: "200.00", tax: "10.00", total: "210.00" },
                          { id: "25", invdate: "2007-10-05", name: "test2", note: "note2", amount: "300.00", tax: "20.00", total: "320.00" },
                          { id: "26", invdate: "2007-09-06", name: "test3", note: "note3", amount: "400.00", tax: "30.00", total: "430.00" },
                          { id: "27", invdate: "2007-10-04", name: "test", note: "note", amount: "200.00", tax: "10.00", total: "210.00" },
                          { id: "28", invdate: "2007-10-03", name: "test2", note: "note2", amount: "300.00", tax: "20.00", total: "320.00" },
                          { id: "29", invdate: "2007-09-01", name: "test3", note: "note3", amount: "400.00", tax: "30.00", total: "430.00"}];
            jQuery("#list48").jqGrid({
                data: mydata,
                datatype: "local",
                height: 'auto',
                rowNum: 30,
                rowList: [10, 20, 30],
                colNames: ['Inv No', 'Date', 'Client', 'Amount', 'Tax', 'Total', 'Notes'],
                colModel: [
                    { name: 'id', index: 'id', width: 60, sorttype: "int" },
                    { name: 'invdate', index: 'invdate', width: 90, sorttype: "date", formatter: "date" },
                    { name: 'name', index: 'name', width: 100, editable: true },
                    { name: 'amount', index: 'amount', width: 80, align: "right", sorttype: "float", formatter: "number", editable: true },
                    { name: 'tax', index: 'tax', width: 80, align: "right", sorttype: "float", editable: true },
                    { name: 'total', index: 'total', width: 80, align: "right", sorttype: "float" },
                    { name: 'note', index: 'note', width: 150, sortable: false}],
                pager: "#plist48",
                viewrecords: true,
                sortname: 'name',
                grouping: true,
                groupingView: { groupField: ['name'] },
                caption: "Grouping Array Data" });

        });

и создать эту сетку

я хочу установить динамическую группировку. Так что пользователь перетаскивает столбец заголовка и опускается в верхнее поле после этой сетки нащупать такое изображение пожалуйста, помогите мне для реализации этого senaryo , Спасибо всем