Select all friends in a event Facebook page (Async)

jft-event-select-all-friends-async.js

javascript:
var _f = document.getElementsByName("checkableitems[]");
var _i = 0;
var _t = setInterval(function(){
	if (_i>=_f.length) clearInterval(_t);
	try { _f[_i++].click() } 
	catch (e) { console.dir(e); }
}, 1);