Select all friends to send facebook inivtations

When you wanted to invite your all friends to a group or a event you just have to do a simple thing.
Just select Invite button and wait for loading the friends list....
After loading that, go to the address bar and type following and press enter.

    javascript:fs.select_all();

Then all of your friends will be selected and you can invite all of them at once.... :)
Enjoy it...
Cheers..