LigerUI 初始化check是否选中

$(function () {         window['g']=             $("#maingrid4").ligerGrid({                 checkbox: true,                 columns: [                 { display: '主键', name: 'CustomerID', align: 'left', width: 120 },                 { display: '公司名', name: 'CompanyName', minWidth: 60 },                 { display: '联系名', name: 'ContactName', width: 50,align:'left' },

                { display: '联系名', name: 'ContactName', minWidth: 140 },

                { display: '联系名', name: 'ContactName', minWidth: 140 },

                { display: '联系名', name: 'ContactName', minWidth: 140 },

                { display: '联系名', name: 'ContactName', minWidth: 140 },                 { display: '城市', name: 'City' }                 ],  pageSize:30,                 data: CustomersData,                   width: '100%', height: '100%', isChecked: f_isChecked             });                          $("#pageloading").hide();         });         function f_isChecked(rowdata)         {             if (rowdata.CustomerID.indexOf('AN') == 0)                 return true;             return false;         }