Pop-up question

1

Hello,
Is it possible to close a pop-up from a button on the same page that the pop-up was launched, not via the popup itslelf.

I have this code which obviously closes a popup but can I modify this at all to make it talk to the pop up from a different browser window?

on (rollOver) {
	getURL("javascript:top.close()");
}

Hope this makes sense.

Cheers!