Extjs4.0.7中的Window 的 frame 属性的有关问题

Extjs4.0.7中的Window 的 frame 属性的问题
在Extjs4.0.7中Ext.window.Window设置frame：true的会出现问题
js代码

// JavaScript DocumentExt.onReady(function(){var _window = Ext.create('Ext.window.Window',{id:"loginWindow",title:'登录',frame:true,width:230,height:120,plain:true,labelWidth:45,resizable:false,buttonAlign:'center',collapsed:true,closeAction:'hide',defaults:{xtype:'textfield',width:180},bodyStyle:{padding:'3px'},items:[{id:"account",fieldLabel:"帐号",width:300},{fieldLabel:"密码",id:'password',inputType:"password",width:300}],buttons:[{text:'确定',handler:function(){var account = Ext.getCmp("account").getValue();var password = Ext.getCmp("password").getValue();alert("用户名:" + account + " ,密码:" + password);}},{text:'取消',handler:function(){_window.hide();}}],listeners:{'show':function(){alert("窗体显现");},'hide':function(){alert("窗体隐藏");},'close':function(){alert("窗体关闭");}}});_window.show();});

// JavaScript DocumentExt.onReady(function(){var _window = Ext.create('Ext.window.Window',{id:"loginWindow",title:'登录',frame:false,width:230,height:120,plain:true,labelWidth:45,resizable:false,buttonAlign:'center',collapsed:true,closeAction:'hide',defaults:{xtype:'textfield',width:180},bodyStyle:{padding:'3px'},items:[{id:"account",fieldLabel:"帐号",width:300},{fieldLabel:"密码",id:'password',inputType:"password",width:300}],buttons:[{text:'确定',handler:function(){var account = Ext.getCmp("account").getValue();var password = Ext.getCmp("password").getValue();alert("用户名:" + account + " ,密码:" + password);}},{text:'取消',handler:function(){_window.hide();}}],listeners:{'show':function(){alert("窗体显现");},'hide':function(){alert("窗体隐藏");},'close':function(){alert("窗体关闭");}}});_window.show();});