Facebook circles

[Hank Mishkoff]

If you go to the Facebook home page and press a certain key sequence
(below), Facebook displays a string of circles that respond
differently to various keystrokes and mouse movements. (Yes, I know,
it's silly, but I like it. What can I say, I'm easily amused.) I
assume that the code for this effect is buried in the Javascript that
downloads with the page, but I can't find it. Can one of you experts
figure it out? I know, to figure it out you'd not only have to be a
Javascript expert, you'd have to be a Javascript expert with way too
much time on your hands...

BTW, the sequence is Up (arrow), Up, Down, Down, Left, Right, Left,
Right, B, A, Enter, right click. After that, you'll see the infamous
circles when you hit Up or Down or scroll the mouse wheel or do
various other things.

 

[Stevo]

If you go to the Facebook home page and press a certain key sequence
(below), Facebook displays a string of circles that respond
differently to various keystrokes and mouse movements. (Yes, I know,
it's silly, but I like it. What can I say, I'm easily amused.) I
assume that the code for this effect is buried in the Javascript that
downloads with the page, but I can't find it. Can one of you experts
figure it out? I know, to figure it out you'd not only have to be a
Javascript expert, you'd have to be a Javascript expert with way too
much time on your hands...

BTW, the sequence is Up (arrow), Up, Down, Down, Left, Right, Left,
Right, B, A, Enter, right click. After that, you'll see the infamous
circles when you hit Up or Down or scroll the mouse wheel or do
various other things.

It uses this image and this JS file (JS errors included):

http://static.ak.fbcdn.net/rsrc.php/zC3MZ/hash/4kxgjjvx.png

http://static.ak.fbcdn.net/rsrc.php/z2H6R/hash/2x44ltf4.js

They really don't want to be doing this in their code:

this.window={cx:vp.x/2,cy:vp.y/2};

 

[David Mark]

It uses this image and this JS file (JS errors included):

http://static.ak.fbcdn.net/rsrc.php/zC3MZ/hash/4kxgjjvx.png

http://static.ak.fbcdn.net/rsrc.php/z2H6R/hash/2x44ltf4.js

They really don't want to be doing this in their code:

this.window={cx:vp.x/2,cy:vp.y/2};

Or this:-

if(ua.safari()||ua.opera()||ua.firefox()>=2||ua.ie()>=6)

They pulled this off Dynamic Drive or the like.