*'''unload''' This event is sent to a window when the window has closed. This is done after the close event. You should place this event handler on the window element. attribute: ''onunload'' * '''close''' This event is sent when a request has been made to close the window when the user presses the close button. If you place an event handler on the window element, you can trap the window close. If you return false from the close handler, the window will not close. Return true to have it close normally. Note that this event is only fired when the user presses the close button on the titlebar; use the unload event to capture all attempts to unload the window. attribute: ''onclose'' https://developer.mozilla.org/en/XUL/Events