1. Open event > Invite Friends > Scroll down or to that part what you want invite(if all > to end)
2. Press Ctrl-Shift-K
3. Copy and paste the code below into the area that opens up with the flashing cursor then hit enter. Done.
javascript:elms=document.getElementsByName("checkableitems[]");for (i=0;i<elms.length;i++){if (elms[i].type="checkbox" )elms[i].click()};
