Is there a way to know that a popup browser window has been closed by the user?

[SaberDude]

I have a "GENERATE" button in my JSP, on clicking this button a new browser window opens( which has no control, meant for viewing only). Now I want to disable this button after the click, and enable it only when the popup has been closed by the user. Is this possible ??

[gits]

this is possible - disable the button on click and in the script of the page in the popup-window refer to the window.opener to enable the button 'onunload' of the popup-page for example.

PS: this only works when the page in the popup is not from another domain - what i assumed at the moment