学习ExtJS访问容器对象

Ext.onReady(function(){
var_window=newExt.Window({
title:"测试窗体",
layout:"form",
width:300,
plain:true,
items:{
id:"name",
xtype:"textfield",
fieldLabel:"姓名"
},
buttons:[{
text:"确定",
handler:function(){
alert(this.ownerCt.ownerCt.items.first().getValue());
alert(this.ownerCt.ownerCt.items.itemAt(0).getValue());
alert(Ext.getCmp("name").getValue());
}
}]
});
_window.show();
});