Ext 窗口取父类页面函数

当跳转子页面无法取上级父类子页面时候

var ret =window.open(AppUrl + 'page/PM_03010318/defUpdate.html?V_WEEKPLAN_GUID=' + V_WEEKPLAN_GUID +'&Oyear='+Ext.getCmp("year").getValue() +'&Omonth='+Ext.getCmp("month").getValue()+'&V_V_ORGCODE='+Ext.getCmp("ck").getValue()+'&V_V_DEPTCODE='+Ext.getCmp("zyq").getValue()        +'&V_V_EQUTYPE='+Ext.getCmp("sblx").getValue()+'&V_V_EQUCODE='+Ext.getCmp("sbmc").getValue()+'&V_V_ZY='+Ext.getCmp("zy").getValue()
        +'&WSIGN='+1+'',"newwindow", 'height=450px,width=650px,top=50px,left=100px,resizable=yes');

添加 “newwindow”