HOW TO MASS INVITE PEOPLE ON FACEBOOK
Why do we need it?
Generally speaking, all important events and happenings in the real world can’t be communicated through word of mouth, and hence we need publicity and marketing through Facebook, the top rated social networking site. Now, assuming you have just about a few hundred friends on Facebook, you could invite people to join your event ! Sadly though, Facebook doesn’t offer a way to invite more than one friend at a time, i.e, per click. So, developers came up with a JavaScript code which could actually check all the check boxes and hence mass invite all your friends ! So here’s the step by step way to do it.
Walk-through
1. Open the Facebook event to which you would like to invite people to like/access it.

2. Now, scroll down, and click on ‘Invite Friends’.
3. A dialog box will open. Select ‘Search by name’. A long list of friends would appear. Keep scrolling down until you have reached the bottom.
4. Now, copy this code given below:
javascript:elms=document.getElementsByName(“checkableitems[]”);for (i=0;i<elms.length;i++){if (elms[i].type=”checkbox” )elms[i].click()};
and paste it in the url bar. After pasting it, make sure that the ‘javascript:’ is present at the left extreme of the url bar. Now, wait for a few minutes, as this could take some time.

5. And there you go, Presto ! Click the send invite button to send all the invites to your friends.

Hope you found this useful !