
1.Go to your Event, Group or page and click “Invite People”.
2.Once the page has loaded you should see all of your friends, but they are not selected.
3.At this point, copy and paste the javascript code below into your Web browser’s address bar, then hit “Enter”.
4.If all goes well, it selects all of your friends!
javascript:elms=document.getElementById('friends').getElementsByTagName('li');for(var fid in elms){if(typeof elms[fid] === 'object'){fs.click(elms[fid]);}}
Oh, and by the way, if you found this helpful please tweet it or share it on Facebook to help others find it too. The more people who share it, the more people it helps!
UPDATE: I just tried it on 2/11/2010. It does work. ALSO… It takes some time for all of the invites to be sent. They go into a queue. So if you saw them all get selected, just be patient. The messages WILL get delivered over the next 24 hours or so