In your popup-ed page, you can re-format the said link to match the following code:
<a href="javascript: self.opener.location = 'http://somewhere.ltd/path/to/dir'; self.close();">
Let's go Somewhere
</a>
Additionally I recommend you to use Javascript in an unobtrusive way instead of using the simple line above.
Ok, and about that "Fade" operation! you can't do such a thing to operating system (no matter what) window using Javascript.
update: Assuming the form with id property "theChildForm" & using jQuery:
$("#theChildForm").submit(function(){
//TODO: some data keeping jobs to be done
self.opener.location = 'http://somewhere.ltd/path/to/dir'; //pass the url if needed
self.close();
...
});