#define PRESSED(%0) \
	(((newkeys & (%0)) == (%0)) && ((oldkeys & (%0)) != (%0)))

public OnPlayerKeyStateChange(playerid, newkeys, oldkeys)
{
	if (PRESSED(KEY_JUMP))
	{
		if (GetPlayerState(playerid) == PLAYER_STATE_DRIVER)
		{
			new engine,lights,alarm,doors,bonnet,boot,objective;
                        GetVehicleParamsEx(GetPlayerVehicleID(playerid),engine,lights,alarm,doors,bonnet,boot,objective);
                        SetVehicleParamsEx(GetPlayerVehicleID(playerid),VEHICLE_PARAMS_ON,lights,alarm,doors,bonnet,boot,objective);
		}
	}
	return 1;
}