gwt reload event

Hi I need to know , if it is possible to handler the moment when the browser trigger one reload event. I can handle the moment when I close My browser , now I want to handler when is trigger the reload -- You received this message because you are subscribed to the Google Groups "Google Web Too

disable refresh button

Hi . I have two simple questions , but I don't know how can implement it. First at all , we need to disable the refresh button and the key F5 , and I don't find the way. Second , we need , when pass more than 5 minutes , we need to invalidate the current session , killing some resources , like coo