Inviting all facebook friends to like your fanpage

invite.js

// Open the friends' list and paste the script to the browser's console
// Tested in Chrome
var buttons = document.querySelectorAll('li.fbProfileBrowserListItem .uiButton'); 
for (var x = 0; x<buttons.length; x++) {
  (function(num){
    buttons[num].click();
  }(x))
}