Reactivate website fuction

Please, may someone help me to achieve thi effects? I still use As2.
The effect is the follow:
I have a site with some images that works like external link (to external website).
Well, when I press on an image, a new browser window will open to show me the new site, while the old website stop music and a text button display the follow:
“Press here to reactivate website”.

You can see an example on this amazing website:

Thanks a lot for anyone who hel me…