easyui datagrid 获取多条选中的数据进行操作

function topCenter(msg) {    $.messager.show({        title: '提示',        msg: msg,        showType: 'slide',        style: {            right: '',            top: document.body.scrollTop + document.documentElement.scrollTop,            bottom: ''        }    });}function warning(msg) {    $.messager.alert('提示', msg, 'warning');}function confirmMsg(msg,func) {    $.messager.confirm('提示', msg, function (r) {        if (r) {            func();        }    });}function datagridFun(dg, url, fun) {    var param1, param2, param3;    switch (arguments.length) {        case 2: param1 = param2 = param3 = null; break;        case 3: param1 = arguments[2]; param2 = param3 = null; break;        case 4: param1 = arguments[2]; param2 = arguments[3]; param3 = null; break;        case 5: param1 = arguments[2]; param2 = arguments[3]; param3 = arguments[4]; break;    }    var datagrid = $('#'+dg);    var rows = datagrid.datagrid('getSelections');    if (rows.length <= 0) {        warning('请选中您要操作的数据！');    }    else {        confirmMsg('您共选择了' + rows.length + '条记录，继续吗？', function () {            var ids = [];            for (var i = 0, j = rows.length; i < j; i++) {                   ids.push(rows[i].id);            }            ids.join(',');            $.post(url, { id: ids.toString(), operator: $.cookie('user'),param1:param1,param2:param2,param3:param3 }, function (result) {                if (result.success) {                    topCenter(result.msg); datagrid.datagrid('reload'); $('#recentOp').datagrid('reload');                    if(fun != undefined) fun();                } else {                    warning(result.msg);                }            }, 'json')        })    }}