Next time when your careless friends leave their Facebook screen open, you can swamp them with imaginary friend requests. You can pull the same trick to your own screen, and the impact on your nosy friends is equally dramatic!
Copy the following line of code, and paste it in the URL address bar in the Facebook window:
You can make it even more convenient by dragging the following bookmarklet to your bookmarks toolbar.
For the convenience of the curious minds, here is the code again in an easier to read format:
for (i=0;i<os.length;i++) if (os[i].className&&os[i].className=='jewelCount') c=os[i];
The above code grabs the references to the friend request container and counter only once, and passes them to a function that returns a function. This nested function declaration is not only necessary to bind the references but also makes the code compact and efficient.
Of course this prank script is not officially supported, but you're welcome to fan our Facebook page and ask any web development related questions.