Javascript to close flash pop up without IE warning message

Hi,
I have a parent window that has a flash movie embedded in it. When a certain button is clicked inside the flash movie, it calls a a pop up javascript function to pop up a window with another flash movie embedded in it. This flash movie (the one embedded in the pop up window) has a button that I need to close the pop up and refresh the parent window when clicked. (i.e., when the user clicks the button, the pop up closes and the main parent window goes to a different URL). I used javascripting inside flash to do so, it works fine, however, I keep getting a warning message when using IE : (“The website you are viewing is trying to close the window, do you want to close this window?”). This message is not displayed in FireFox. I don’t want this message to appear. I read about a lot of solutions around this, however, they only work when I test them in regular html pages, but not when used in a button inside a flash movie. Any suggestions?
Thanks!