flex 提示是否删除、确认、取消

//删除节点
protected function btnDelete_clickHandler(event:MouseEvent):void
{
Alert.show("确认要删除吗？","删除提示",Alert.YES|Alert.NO,null,
function(event:CloseEvent):void
{
if(event.detail==Alert.YES)
{
// TODO Auto-generated method stub
updatatype("delete");
}
else if(event.detail==Alert.NO)
{}
return;
},this.expClass,Alert.NO);
}