Extjs GridPanle列动态隐藏

Ext.onReady(function() {/*****************/var currentWeek=0;  Ext.Ajax.request({url : './dept/getCurrentWeek.do',params : '',method : 'POST',async: false,success : function(response, options) {currentWeek = response.responseText;},failure : function() {Ext.Msg.alert("提示信息", "按钮加载失败,请稍后重试！");}});ajax同步,需要增加扩展类,下一步,根据当前的currentWeek,确定哪些列需要显示.var ObtainPhoneType = Ext.data.Record.create(['id', 'w20', 'w21', 'w22', 'w23']);var initObtainPhoneType = {};var obtain_phone_type_columns = [{header: "ID编号",align: 'center',width: 80,sortable: false,dataIndex: 'id'},{header: "W20",align: 'center',width: 80,sortable: false,dataIndex: 'w20',hidden:true},{header: "W21",align: 'center',width: 80,sortable: false,dataIndex: 'w21',hidden:false},{header: "W22",align: 'center',width: 80,sortable: false,dataIndex: 'w22',hidden:true},{header: "W23",align: 'center',width: 80,sortable: false,dataIndex: 'w23',hidden:true}];var obtain_phone_type_api = {read: '',update: '',create: '',destroy: ''}try{// create gridvar obtain_phone_type_grid = new Fee.grid.EditBaseGridPanel(obtain_phone_type_api, ObtainPhoneType,initObtainPhoneType, obtain_phone_type_columns, 'id', {limit: 32,addBtn: false,autoSave: false});//currentWeek=parseInt(currentWeek);var count=1;if(...){obtain_phone_type_grid.colModel.setHidden(1,false);//隐藏第2列,下标有0 开始,1为index计数.非dataIndexobtain_phone_type_grid.colModel.setHidden(2,false);//}// render to DIVobtain_phone_type_grid.render('obtain_phone_type');}catch(e){alert(e);}});/*****************/