Extjs window嵌套iframe页面中关闭window

var windowElement = parent.Ext.fly(window.frameElement).up('div.x-window');

parent.Ext.getCmp(windowElement.id).close();

多层iframe嵌套页面中关才最外层的Ext Window

function closewindow() {
	var currentWin = window;
	while (top != currentWin) {
		var prentExt = currentWin.parent.Ext;
		var fElement = prentExt.get(currentWin.frameElement);
		var windowElement = fElement.up('div.x-window');
		if (windowElement) {
			var winId = windowElement.id;
			var extWin = prentExt.getCmp(winId);
			extWin.close();
			return true;
		} else {
			currentWin = currentWin.parent;
		}
	}
	alert('窗口关闭错误');
	return false;
}