Listening and cancelling events

To listen to an event you need to use the custom "registerEvent" function:

registerEvent(EventName ; string, Listener ; Array)

Example usage:

registerEvent("org.bukkit.event.block.BlockPlaceEvent", {
    handleEvent: function(event) {
        event.getPlayer().sendMessage("You tried to place " + event.getBlock().getType().toString());
        event.setCancelled(true);
    }
});