Here is a bullet proof method to Select All of your friends or fans inside Facebook. This is especially useful for inviting friends and fans to events within Facebook. This code does not rely on some sort of javascript, it uses a Macro which clicks on the check boxes just like a human would. Meaning this works in the current Facebook in 2011. All the other scripts no longer work.

Here’s how to use it:

1. Install iMacro in Firefox.
2. Open Facebook in firefox, and go to either your event, or your like page and click invite all guests/friends.
3. Scroll to the bottom of your friends list so that all your friends have loaded in the little window.
4. Go to the iMacro icon on the top of the tool bar near refresh.
5. Click on the record tab in iMacro. Click Record, then Stop. If you don’t do this it won’t work.
6. Then Click load, and load the Select All macro that you’ve unzipped.
7. Go to the Play tab and Click Play.
8. The macro will then check mark your entire friend list up to 5000. You can stop it once your entire friends list is done.

You can download the Select All Robot here. (Fully tested and still working in 2012)