extjs 窗体请教

  winHome = new Ext.Window({
                            title: "退房",
                            iconCls: "House",
                            Icon: "House",
                            width: 800,
                            height: 500,
                            maximizable: false,
                            minimizable: false,
                            closable : true,                        //是否可关闭
                            closeAction : 'close',// 关闭窗口是销毁窗口，为'hide'则隐藏
                            maximizable : true,                 //是否可最大化
                            draggable:false,//拖动 
                            resizable:false, //变大小 
                            autoLoad: {
                                url: "SkyOutHome.aspx?HomeId=" + HomeId,
                                mode: "iframe",
                                showMask: true,
                                subMainId : "tab-OutHome-main"  
                            }
                        });
                        winHome.show();怎么在SkyOutHome.aspx页面上关闭这个窗体呢！