@EventHandler
    public void onPlayerInteract(PlayerInteractEvent event)
    {
    	Action a = event.getAction();
    	ItemStack is = event.getItem();

    	if (a == Action.RIGHT_CLICK_BLOCK || is == null || is.getType() == Material.AIR)
    		return;
    	if (is.getType() == Material.ENDER_PORTAL_FRAME)
    		openGUI(event.getPlayer());
    }