extjs 怎么实现同时刷新多个页面的store

 var win = top.document.getElementById("grzx").contentWindow;
var mrgrid = win.Ext.getCmp("myrqt");      
var mrstore = mrgrid.getStore();
mrstore.load();
var cggrid = win.Ext.getCmp("cgxx");
var cgstore = cggrid.getStore();// 运行到这里报getstore错误
cgstore.load();

 var tab_n = window.parent.Ext.getCmp("mylb");
                    if(tab_n){
                        var home = window.parent.document.getElementById("zsk_mylb").contentWindow;             
                        或var home1 = top.document.getElementById("zsk_mylb").contentWindow;
                        var grid = home.Ext.getCmp("mylbgrid");
                        var store = grid.getStore();// 得到grid的store
                        store.load(); 
                    }

你的cgxx是datagrid，combobox这种有store配置的没有，没有肯定报错了，自己认真检查下类型和id是否正确